Mitsubishi Electric 800 Series Instruction Manual
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Mitsubishi Electric 800 Series Instruction Manual

Rs-485 interface board, rs-485 communication terminals
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INVERTER
RS-485 interface board
FR-A8ERS
INSTRUCTION MANUAL
RS-485 communication terminals
PRE-OPERATION INSTRUCTIONS
INSTALLATION
WIRING AND CONFIGURATION
PARAMETER
PROTECTIVE FUNCTIONS
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Summary of Contents for Mitsubishi Electric 800 Series

  • Page 1 INVERTER RS-485 interface board FR-A8ERS INSTRUCTION MANUAL RS-485 communication terminals PRE-OPERATION INSTRUCTIONS INSTALLATION WIRING AND CONFIGURATION PARAMETER PROTECTIVE FUNCTIONS...
  • Page 2 Thank you for choosing this RS-485 interface board for Mitsubishi inverter. This Instruction Manual provides handling information and precautions for use of this product. Incorrect handling might cause an unexpected fault. Before using this product, always read this Instruction Manual carefully to use this product correctly. Please forward this Instruction Manual to the end user.
  • Page 3  Additional Instructions The following instructions must be also followed. If the product is handled incorrectly, it may cause unexpected fault, an injury, or an electric shock. Caution Transportation and mounting  Do not install or operate the product if it is damaged or has parts missing. ...

  • Page 4: Table Of Contents

    — CONTENTS — 1 PRE-OPERATION INSTRUCTIONS Unpacking and product confirmation..........................6 1.1.1 Product confirmation ................................6 1.1.2 Component names................................7 1.1.3 Terminal layout ..................................8 1.1.4 Terminal connection diagrams .............................. 9 1.1.5 Terminal specifications ................................. 9 2 INSTALLATION Pre-installation instructions ............................10 Installation procedure ..............................10 3 WIRING AND CONFIGURATION Connection of RS-485 terminals and wires.........................12...
  • Page 5 4.3.3 Operation selection at a communication error (Pr.502, Pr.779)..................29 Communication specifications of the Mitsubishi inverter protocol (computer link communication)....32 4.4.1 Communication specifications ............................34 4.4.2 Communication procedure ..............................35 4.4.3 Communication operation presence/absence and data format types ................. 36 4.4.4 Data definitions ...................................
  • Page 6 Setting multiple parameters as a batch........................91 5 PROTECTIVE FUNCTIONS...

  • Page 7: Pre-Operation Instructions

    PRE-OPERATION INSTRUCTIONS Unpacking and product confirmation Take the product out of the package, check the product name, and confirm that the product is as you ordered and intact. The product is an RS-485 interface board for the FR-A800-E (with a built-in Ethernet board) series inverter. 1.1.1 Product confirmation Check the enclosed items.

  • Page 8: Component Names

    1.1.2 Component names Front view Rear view Refer Symbol Name Description to page Terminal block Connect signal cables. Connector Connects to the interface board connector of the inverter. Terminating resistor selection Switches ON or OFF the internal terminating resistor. switch (SW1) PRE-OPERATION INSTRUCTIONS...

  • Page 9: Terminal Layout

    1.1.3 Terminal layout Name Description RDA1 Inverter receive + (RXD1+) Terminating resistor switch RDB1 Initially-set to "OPEN". Inverter receive - (RXD1-) Set only the terminating resistor switch of the remotest inverter to RDA2 Inverter receive + the "100Ω" position. (RXD2+) (for branch) RDB2 Inverter receive -...

  • Page 10: Terminal Connection Diagrams

    1.1.4 Terminal connection diagrams TXD+ Data TXD- transmission RXD+ Data RXD- reception (SG) Terminating resistor (Permissible load current 100mA) 1.1.5 Terminal specifications Terminal Terminal name Terminal function description Symbol TXD+ Inverter transmission terminal The RS-485 terminals enables the communication by RS-485. TXD- Conforming standard: EIA-485 (RS-485) RXD+...

  • Page 11: Installation

    INSTALLATION Pre-installation instructions Check that the inverter's input power and the control circuit power are both OFF. Caution  With input power ON, do not install or remove the product. Otherwise, the inverter and the product may be damaged.  To avoid damage due to static electricity, static electricity in your body must be discharged before you touch the product.
  • Page 12 Spacer Inverter side connector Spacer NOTE • The Ethernet board earth plate is not required for installing the product. • Do not install the product to a plug-in option connector. INSTALLATION...

  • Page 13: Wiring And Configuration

    WIRING AND CONFIGURATION Connection of RS-485 terminals and wires • The terminal size of the product is the same as that of the control circuit terminal block of the inverter. Refer to the Instruction Manual (Detailed) of the inverter for the wiring method. System configuration of RS-485 terminals •...
  • Page 14 • Combination of computer and multiple inverters (1:n) Station 0 Station 1 Station n Computer Inverter Inverter Inverter RS-485 RS-485 RS-485 RS-485 terminals terminals terminals interface terminals ∗ ∗ ∗ ∗Set only the terminating resistor switch of the remotest inverter to the "100 Ω" position. Twisted pair cable Station 0 Station 1...

  • Page 15: How To Wire Rs-485 Terminals

    How to wire RS-485 terminals • 1 inverter and 1 computer with RS-485 terminals Computer ∗2 ∗1 • Multiple inverters and 1 computer with RS-485 terminals Computer ∗2 ∗1 Station 0 Station 1 Station n  Make connection in accordance with the Instruction Manual of the computer to be used with. Fully check the terminal numbers of the computer since they vary with the model.

  • Page 16: Two-Wire Type Connection

    NOTE • For branching, connect the wires as shown below. TXD RXD TXD RXD To computer ground To computer receive To receiving terminal To computer send of the next inverter To sending terminal of the next inverter To next inverter To earth (ground) terminal Two-wire type connection...

  • Page 17: Parameter

    PARAMETER Operation mode setting To enable RS-485 communication operation via the RS-485 terminals on the product, select the Network operation mode for the inverter. 4.1.1 Operation mode switching and communication startup mode (Pr.79, Pr.340)  Operation mode switching conditions Operation mode switching conditions •...
  • Page 18 Pr.340 Pr.79 Operation mode at power-ON, at power Operation mode switching setting setting restoration, or after a reset 0 (initial Switching among the External, PU, and NET operation modes is External operation mode value) enabled.  PU operation mode PU operation mode fixed Switching between the External and NET operation modes is External operation mode enabled.
  • Page 19  The setting value "2 or 12" of Pr.340 is used primarily during communication operation of the inverter via the RS-485 terminals of the product. Even if an instantaneous power failure occurs while Pr.57 Restart coasting time ≠ "9999" (with automatic restart after instantaneous power failure), inverter continues operation at the condition before the instantaneous failure.

  • Page 20: Start Command Source And Frequency Command Source During Communication Operation

    Start command source and frequency command source during communication operation The start and frequency commands from an external device are enabled during communication via the RS-485 terminals of the product or the communication option. The command source in the PU operation mode can also be selected. Initial Setting Name...
  • Page 21 Initial Setting Name Description group value range The RS-485 terminals are the command source when in the PU operation mode. The PU connector is the command source when in the PU operation mode. PU mode The USB connector is the command source when in the PU operation mode. operation D013 9999...

  • Page 22: Selection Of Command Source In Network Operation Mode (Pr.550)

    4.2.1 Selection of command source in Network operation mode (Pr.550) • Either of the RS-485 terminals or the communication option can be specified for the command source in the Network operation mode. • For example, whether or not the communication option is mounted, set Pr.550 ="1" to write parameters from or input the start and frequency commands via RS-485 terminals in the Network operation mode.
  • Page 23 • Changed setting values are enabled at power-ON or inverter reset. Command source Pr.550 Pr.551 Remarks Communication setting setting PU connector USB connector RS-485 terminals option PU operation NET operation   mode mode   NET operation   PU operation mode mode ...
  • Page 24 Command source Pr.550 Pr.551 Remarks Communication setting setting PU connector USB connector RS-485 terminals option PU operation NET operation   mode mode   NET operation With communication  mode option   PU operation mode NET operation Without communication ...

  • Page 25: Controllability Through Communication Via The Rs-485 Terminals

    4.2.3 Controllability through communication via the RS-485 terminals Controllability in each operation mode External/PU External/PU NET operation Condition NET operation combined combined (when (Pr.551 Item External (when RS-485 operation operation communication setting) operation operation terminals are mode 1 mode 2 option is used) used) ...
  • Page 26  Follows the Pr.338 Communication operation command source and Pr.339 Communication speed command source settings. (Refer to the Instruction Manual (Detailed) of the inverter.)  At occurrence of RS-485 communication error, the inverter cannot be reset from the computer.  PU stop is only enabled.

  • Page 27: Operation At Fault

    4.2.4 Operation at fault Operation in each operation mode at error occurrences External/PU External/PU NET operation Conditions NET operation combined combined (when Fault record (Pr.551 External (when RS-485 operation operation communication setting) operation operation terminals are mode 1 mode 2 option is used) used) ...

  • Page 28: Initial Setting Of Operation Via Communication

    Initial setting of operation via communication Set the action when the inverter is performing operation via communication. • Set the RS-485 communication protocol. (Mitsubishi inverter protocol/MODBUS RTU protocol) • Set the action at fault occurrence or at writing of parameters Initial Setting Name...

  • Page 29: Setting The Communication Protocol (Pr.549)

    4.3.1 Setting the communication protocol (Pr.549) • Select the RS-485 communication protocol. • The MODBUS-RTU protocol is used for communication via the RS-485 terminals on the product. Pr.549 setting Communication protocol 0 (initial value) Mitsubishi inverter protocol (computer link) MODBUS RTU protocol 4.3.2 Communication EEPROM write selection (Pr.342) •...

  • Page 30: Operation Selection At A Communication Error (Pr.502, Pr.779)

    4.3.3 Operation selection at a communication error (Pr.502, Pr.779) • During communication via the RS-485 terminals, the inverter operation at a communication error can be selected. The operation is active under the Network operation mode. • Select the stop operation at the retry count excess (Pr.335, only with Mitsubishi inverter protocol) or at a signal loss detection (Pr.336, Pr.539).
  • Page 31 • The following charts show the inverter operations when a communication line error occurs. Pr.502 = "0" (initial value) Pr.502 = "1" Pr.502 = "2" Fault detected Fault cleared Fault detected Fault cleared Fault detected Fault cleared Communication Communication Communication fault fault fault...
  • Page 32 NOTE • Fault output indicates the Fault signal (ALM) and an alarm bit output. • When the fault output is set enabled, fault records are stored in the faults history. (A fault record is written to the faults history at a fault output.) •...

  • Page 33: Communication Specifications Of The Mitsubishi Inverter Protocol (Computer Link Communication)

    Communication specifications of the Mitsubishi inverter protocol (computer link communication) • Parameter setting, monitoring, etc. can be performed using Mitsubishi inverter protocol • To make communication between the personal computer and inverter, setting of the communication specifications must be made to the inverter in advance. Data communication cannot be made if the initial settings are not made or if there is any setting error.
  • Page 34 Initial Setting Name Description group value range Without parity check RS-485 communication N034 With parity check at odd numbers parity check selection With parity check at even numbers Set the permissible number of retries for unsuccessful data reception. If the RS-485 0 to 10 number of consecutive errors exceeds the permissible value, the inverter...

  • Page 35: Communication Specifications

    NOTE • The monitored items and parameter settings can be read during communication with the Pr.336 RS-485 communication check time interval = "0 (initial value)" setting, but such operation will become faulty once the operation mode is changed to the NET operation mode. When the NET operation mode is selected as the start-up operation mode, communication is performed once, then a Communication fault (inverter) (E.SER) occurs.

  • Page 36: Communication Procedure

    4.4.2 Communication procedure • Data communication between the computer and inverter is made in the following procedure. Request data is sent from the computer to the inverter. (The inverter will not send data unless requested.) After waiting for the waiting time, The inverter sends reply data to the computer in response to the computer request.

  • Page 37: Communication Operation Presence/Absence And Data Format Types

    4.4.3 Communication operation presence/absence and data format types • Data communication between the computer and inverter is made in ASCII code (hexadecimal code). • Communication operation presence/absence and data format types are as follows. Operation Operation Multi Parameter Inverter Parameter Symbol Operation Monitor...
  • Page 38 • Data writing format a. Communication request data from the computer to the inverter Number of characters Format Inverter Instruction  Data Sum check   station No. code   Inverter Instruction  Data Sum check   station No. code ...
  • Page 39 • Data reading format a. Communication request data from the computer to the inverter Number of characters Format Inverter station  Instruction code Sum check     c. Reply data from the inverter to the computer (No data error detected) Number of characters Format Inverter station...
  • Page 40 e. Transmission data from the computer to the inverter when reading data Number of characters Format Inverter station (No data error    detected) Inverter station (Data error    detected)  Indicates a control code.  Specifies the inverter station numbers in the range of H00 to H1F (stations 0 to 31) in hexadecimal. ...

  • Page 41: Data Definitions

    4.4.4 Data definitions • Control code Signal name ASCII Code Description Start Of Text (Start of data) End Of Text (End of data) Enquiry (Communication request) Acknowledge (No data error detected) Line Feed Carriage Return Negative Acknowledge (Data error detected) •...
  • Page 42 NOTE • When Pr.337 (Waiting time setting) ≠ "9999", create a communication request data without "waiting time" in the data format. (The number of characters decreases by 1.) • The data check time varies depending on the instruction code. (Refer to page 43.) •...
  • Page 43 • Error code If any error is found in the data received by the inverter, its error definition is sent back to the computer together with the NAK code. Error Error Item Error Description Inverter Operation Code The number of errors consecutively detected in communication request Computer NAK error data from the computer is greater than the permissible number of retries.

  • Page 44: Response Time

    4.4.5 Response time Data sending time (refer to the following formula) Inverter data processing time = Waiting time + Data check time (setting × 10 ms) (depends on the Computer instruction code (see the Inverter following table)) Time Inverter 10 ms or more necessary Computer Data sending time (refer to the following formula) [Formula for data transmission time]...

  • Page 45: Retry Count Setting (Pr.335)

    4.4.6 Retry count setting (Pr.335) • Set the permissible number of retries at data receive error occurrence. (Refer to page 42 for data receive error for retry.) • When the data receive errors occur consecutively and the number of retries exceeds the permissible number setting, a communication fault (E.SER) occurs and the inverter trips.

  • Page 46: Signal Loss Detection (Pr.336 Rs-485 Communication Check Time Interval)

    NOTE • The operation at a communication error occurrence depends on the Pr.502 Stop mode selection at communication error setting. (Refer to page 4.4.7 Signal loss detection (Pr.336 RS-485 communication check time interval) • If a signal loss (communication stop) is detected between the inverter and computer as a result of a signal loss detection, a communication fault (E.SER) occurs and the inverter trips.

  • Page 47: Instructions For The Program

    4.4.8 Instructions for the program • When data from the computer has any error, the inverter does not accept that data. Hence, in the user program, always insert a retry program for data error. • All data communication, for example, run command or monitoring, are started when the computer gives a communication request.

  • Page 48: Setting Items And Set Data

    Caution  Always set the communication check time interval before starting operation to prevent hazardous conditions.  Data communication is not started automatically but is made only once when the computer provides a communication request. If communication is disabled during operation due to signal cable breakage etc., the inverter cannot be stopped. When the communication check time interval has elapsed, the inverter will trip (E.SER).
  • Page 49 Number of Read/ Instruction Item Data description data digits write code (Format)  Output H0000 to HFFFF: Output frequency in 0.01 Hz increments 4 digits frequency/ Read (The display can be changed to the rotations per minute using Pr.37, Pr.144 and (B.E/D) speed Pr.811.
  • Page 50 Number of Read/ Instruction Item Data description data digits write code (Format)  H0000 to HFFFF: Two latest fault records b8 b7 Second fault in past Latest fault Fourth fault in past Third fault in past Sixth fault in past Fifth fault in past Eighth fault in past Seventh fault in past...
  • Page 51 Number of Read/ Instruction Item Data description data digits write code (Format)  Set frequency Read the set frequency/speed from the RAM or EEPROM. (RAM) H0000 to HFFFF: Set frequency in 0.01 Hz increments 4 digits Read (The display can be changed to the rotations per minute using Pr.37, Pr.144 and (B.E/D) Set frequency Pr.811.
  • Page 52 Number of Read/ Instruction Item Data description data digits write code (Format)  All parameters return to initial values. Whether to clear communication parameters or not can be selected according to the data. Parameter clear H9696: Communication parameters are cleared. H5A5A: Communication parameters are not cleared.
  • Page 53 Number of Read/ Instruction Item Data description data digits write code (Format)  2 digits Read (B.E1/D) Second parameter When setting the calibration parameters  changing H00: Frequency  (instruction code H01: Parameter-set analog value HFF = 1, 9) H02: Analog value input from terminal 2 digits Write (A1,C/D)
  • Page 54 NOTE • Set 65520 (HFFF0) as a parameter value "8888" and 65535 (HFFFF) as "9999". • For the instruction codes HFF, HEC and HF3, their values are held once written but cleared to zero when an inverter reset or all clear is performed. •...

  • Page 55: List Of Calibration Parameters

    4.4.10 List of calibration parameters Instruction code Instruction code Name Name Terminal 2 frequency setting bias C2 (902) C18 (920) Terminal 1 gain command (torque) frequency C3 (902) Terminal 2 frequency setting bias C19 (920) Terminal 1 gain (torque) Terminal 2 frequency setting gain 125 (903) C8 (930) Current output bias signal...

  • Page 56: Operation Command

    4.4.11 Operation command Instruction Item Description Example  code length b0: AU (Terminal 4 input selection) [Example 1] H02 Forward rotation b1: Forward rotation command b2: Reverse rotation command Operation b3: RL (Low-speed operation command) 8 bits command b4: RM (Middle-speed operation command) b5: RH (High-speed operation command) [Example 2] H00 Stop b6: RT (Second function selection)

  • Page 57: Inverter Status Monitor

    4.4.12 Inverter status monitor Instruction Item Description Example  code length b0: RUN (Inverter running) b1: During forward rotation [Example 1] H02 During forward rotation b2: During reverse rotation Inverter b3: SU (Up to frequency) status 8 bits b4: OL (Overload warning) monitor b5: IPF (Instantaneous power failure/ [Example 2] H80...

  • Page 58: Multi Command (Hf0)

    4.4.13 Multi command (HF0) Sending data format from computer to inverter Number of characters Format Send Receive Instruction Inverter data data Waiting Code Data1 Data2 Sum check   station No. type type time (HF0)   Reply data format from inverter to computer (No data error detected) Number of characters Format Send...
  • Page 59  Combination of data 1 and data 2 for reply Data type Data 1 Data 2 Remarks Inverter status monitor Output frequency (speed) Inverter status monitor (extended) is same as (extended) instruction code H79 (Refer to page Replys the monitor item specified in instruction code HF3 for special monitor.

  • Page 60: Modbus Rtu Communication Specification

    MODBUS RTU communication specification • Parameter setting, monitoring, etc. can be performed using MODBUS RTU communication protocol. • To make communication between the personal computer and inverter, setting of the communication specifications must be made to the inverter in advance. Data communication cannot be made if the initial settings are not made or if there is any setting error.
  • Page 61 Initial Name Setting range Description group value Communication error Displays the communication error count during MODBUS RTU  N080 count communication. Read-only. MODBUS RTU communication, but the inverter trips in the NET operation mode. MODBUS RTU Set the interval of the communication check (signal loss detection) N002 communication check time.

  • Page 62: Communication Specifications

    4.5.1 Communication specifications • The communication specifications are given below. Related Item Description parameter Communication protocol MODBUS RTU protocol Pr.549 Conforming standard EIA-485 (RS-485) — Connectable units 1:N (maximum 32 units), setting is 0 to 247 stations Pr.331 Selected among 300/600/1200/2400/4800/9600/19200/38400/57600/76800/115200 Communication Speed Pr.332 Control procedure...

  • Page 63: Outline

    4.5.2 Outline • The MODBUS communication protocol was developed by Modicon for programmable controllers. • The MODBUS protocol uses exclusive message frames to perform serial communication between a master and slaves. These exclusive message frames are provided with a feature called "functions" that allows data to be read or written. These functions can be used to read or write parameters from the inverter, write input commands to the inverter or check the inverter's operating status, for example.
  • Page 64 • Data check time Item Check time Various monitors, operation command, <12 ms Frequency setting (RAM) Parameter read/write, <30 ms frequency setting (EEPROM) Parameter clear / all clear <5 s Reset command No answer • Query A message is sent to the slave (for instance, the inverter) having the address specified by the master. •...

  • Page 65: Message Frame (Protocol)

    4.5.4 Message frame (protocol) • Communication method Basically, the master sends a Query message (question), and slaves return the Response message (response). At normal communication, the Device Address and Function Code are copied as they are, and at erroneous communication (illegal function code or data code), bit7 (= 80 h) of the Function Code is turned ON, and the error code is set at Data Bytes.
  • Page 66 • Details of protocol The following table explains the four message fields. Start Address Function Data CRC Check n  8 bits 8 bits 8 bits 8 bits 8 bits Message field Description 0 to 247 can be set in single byte lengths (8 bits). Set "0" when sending broadcast messages (instructions to all addresses), and "1 to 247"...

  • Page 67: Function Code List

    4.5.5 Function code list Message Read/ Broadcast format Function name Code Outline write communication reference page The data of the holding registers is read. The various data of the inverter can be read from MODBUS registers. System environmental variable (Refer to page 78.) Read Holding...

  • Page 68: Read Holding Register (Reading Of Data Of Holding Registers) (H03 Or 03)

    Message Read/ Broadcast format Function name Code Outline write communication reference page The number of registers that were successfully accessed by the previous communication is read. Queries by function codes H03 and H10 are supported. Read holding register Read The number and start address of holding registers successfully Not available access log accessed by the previous communication are returned.
  • Page 69 • Query message setting Message Description Set the address to send messages to. Broadcast communication is not possible. Slave Address (Invalid when "0" is set.) Function Set H03. Set the address from which to start reading of data from the holding register. Start address = start register address (decimal) - 40001 Starting Address For example, when start register address 0001 is set, the data of holding register...
  • Page 70 Example) Read the register values of 41004 (Pr.4) to 41006 (Pr.6) from slave address 17 (H11). Query message Slave Address Function Starting Address No. of Points CRC Check (8 bits) (8 bits) (8 bits) (8 bits) (8 bits) (8 bits) (8 bits) (8 bits) Normal response (Response message)

  • Page 71: Preset Single Register (Writing Of Data To Holding Registers) (H06 Or 06)

    4.5.7 Preset Single Register (writing of data to holding registers) (H06 or 06) • The content of the "system environmental variables" and "inverter parameters" assigned to the holding register area (refer to the register list (page 78)) can be written. •...

  • Page 72: Diagnostics (Diagnosis Of Functions) (H08 Or 08)

    • Content of normal response With a normal response, the content is the same as a to d (including the CRC check) query messages. In the case of broadcast communication, no response is returned. Example) Write 60 Hz (H1770) to 40014 (running frequency) of slave address 5 (H05). Query message Slave Address Function...

  • Page 73: Preset Multiple Registers (Writing Of Data To Multiple Holding Registers) (H10 Or 16)

    • Query message setting Message Description Set the address to send messages to. Broadcast communication is not possible. Slave Address (Invalid when "0" is set.) Function Set H08. Subfunction Set H0000. Data Any data 2 bytes long can be set. Setting range is H0000 to HFFFF. •...
  • Page 74 • Query message setting Message Description Slave Address Set the address to send messages to. Setting "0" enables broadcast communication. Function Set H10. Set the address from which to start writing of data to the holding register. Start address = start register address (decimal) - 40001 Starting Address For example, when start register address 0001 is set, the data of holding register address 40002 is read.

  • Page 75: Read Holding Register Access Log (H46 Or 70)

    4.5.10 Read Holding Register access Log (H46 or 70) • Queries by function codes H03 and H10 are supported. The number and start address of holding registers successfully accessed by the previous communication are returned. "0" is returned for both the number and start address for queries other than the function codes. •...

  • Page 76: Error Response

    Example) Read the successful register start address and number of successful access from slave address 25 (H19). Query message Slave Address Function CRC Check (8 bits) (8 bits) (8 bits) (8 bits) Normal response (Response message) Slave Address Function Starting Address No.
  • Page 77 • Error code list Code Error Item Error description The query message from the master is set with a function code that cannot be handled ILLEGAL FUNCTION by the slave. The query message from the master is set with a register address that cannot be IILLEGAL DATA ADDRESS handled by the inverter.
  • Page 78 Error check items Error item Error description Inverter operation The data received by the inverter is different from the specified Parity error parity (Pr.334 setting). The data received by the inverter is different from the stop bit Framing error length (Pr.334) setting. The next data has been sent by the master before the inverter When this error occurs, Pr.343 is incremented by Overrun error...

  • Page 79: Modbus Register

    4.5.12 MODBUS register • System environmental variables Register Definition Read/write Remarks 40002 Inverter reset Write Any value can be written 40003 Parameter clear Write Set H965A for the write value. 40004 All parameter clear Write Set H99AA for the write value. 40006 Parameter clear Write...
  • Page 80 Definition Control input command Inverter status Stop command RUN (Inverter running)  Forward rotation command During forward rotation Reverse rotation command During reverse rotation RH (High-speed operation command) SU (Up to frequency)   RM (Middle-speed operation command) OL (Overload warning) ...
  • Page 81 Mode Read value Write value H0000 H0010  H0001 H0011  H0002 ― H0003 ― H0004 H0014 PU+EXT H0005 ―  Enable/disable parameter writing by Pr.79 and Pr.340 settings. For the details, refer to the Instruction Manual (Detailed) of the inverter. Restrictions in each operation mode conform with the computer link specification.
  • Page 82 Register Name Read/write Remarks Terminal 2 frequency setting gain (analog 42093 Read/Write Analog value (%) set to C4 (903) value) C4 (903) Terminal 2 frequency setting gain (terminal Analog value (%) of voltage (current) applied to 43903 Read analog value) terminal 2 Terminal 4 frequency setting bias frequency C5 (904)
  • Page 83 Register Name Read/write Remarks 42110 Terminal 1 gain (torque/magnetic flux) Read/Write Analog value (%) set to C19 (920) C19 (920) Terminal 1 gain (torque/magnetic flux) 43920 Read Analog value (%) of voltage applied to terminal 1 (terminal analog value) Motor temperature detection calibration 42115 Read/Write (analog input)
  • Page 84 Register Name Read/write Remarks 42122 Terminal 4 bias (torque/magnetic flux) Read/Write Analog value (%) set to C39 (932) C39 (932) Terminal 4 bias (torque/magnetic flux) Analog value (%) of current (voltage) applied to 43932 Read (terminal analog value) terminal 4 C40 (933) 41933 Terminal 4 gain command (torque/magnetic flux)
  • Page 85 • Model information monitor Register Definition Read/Write Remarks 44001 Model (First and second characters) Read 44002 Model (Third and fourth characters) Read 44003 Model (Fifth and sixth characters) Read 44004 Model (Seventh and eighth characters) Read 44005 Model (Ninth and tenth characters) Read Reading inverter type in ASCII code.

  • Page 86: Pr.343 Communication Error Count

    4.5.13 Pr.343 Communication error count • The communication error occurrence count can be checked. Minimum Parameter Setting range Initial value setting range (Read only) NOTE • The communication error count is temporarily stored in the RAM memory. The value is not stored in EEPROM, and so is cleared to 0 when power is reset and the inverter is reset.

  • Page 87: Signal Loss Detection (Pr.539 Modbus Rtu Communication Check Time Interval)

    4.5.15 Signal loss detection (Pr.539 MODBUS RTU communication check time interval) • If a signal loss (communication) is detected between the inverter and the master as a result of a signal loss detection, an inverter communication fault (E.SER) occurs and the inverter trips. •...
  • Page 88 Broadcast communication Operation mode External Query Message1 Query Message2 PLC (master) Inverter (slave) Inverter (slave) PLC (master) Data absence time Fault (3.5 bytes or more) (E.SER) Pr.539 Communication check counter Check start Time NOTE • The operation at a communication error occurrence depends on the Pr.502 Stop mode selection at communication error setting.

  • Page 89: Automatic Connection With Got

    Automatic connection with GOT When the automatic connection is enabled in the GOT2000 series, the inverter can communicate with the GOT2000 series with only setting the station number and connecting the GOT. This eliminates the need for the communication parameter setting. Initial Setting Name...

  • Page 90: Got2000 Series Automatic Recognition

    4.6.2 GOT2000 series automatic recognition • When the GOT2000 series is connected, the parameters required for the GOT connection are automatically changed by setting the automatic recognition on the GOT2000 series side. • Set the station number (Pr.331) of the inverter before the automatic recognition is performed. •...

  • Page 91: Parameter Reading/Writing Restriction When The Password Function Is Active

    Parameter reading/writing restriction when the password function is active • When a password is registered, parameter reading/writing via the RS-485 terminals is restricted as follows according to the setting in Pr.296 Password lock level. NET operation mode operation command  Pr.296 setting Read Write...
  • Page 92 Setting multiple parameters as a batch Parameter settings are changed as a batch. Those include communication parameter settings for the Mitsubishi's human machine interface (GOT) connection and the parameter setting for the rated frequency settings of 50 Hz/60 Hz and acceleration/deceleration time. Multiple parameters are changed automatically.
  • Page 93 • When "11 or 13" is set in Pr.999, the communication parameters for the GOT connection via RS-485 terminals are automatically set. Refer to Name Initial value Pr.999 ="11" Pr.999 ="13" page Operation mode selection RS-485 communication speed 1152 RS-485 communication stop bit length / data length RS-485 communication parity check selection RS-485 communication retry count 9999...
  • Page 94 PROTECTIVE FUNCTIONS Operation panel E.CTE FR-LU08 Circuit fault indication Name RS-485 terminals power supply short circuit When the power supply for the RS-485 terminals are short circuited, this function shuts off the power output. Description At this time, communication from the RS-485 terminals cannot be made. To reset, use of the operation panel, enter the RES signal, or switch power OFF then ON again.
  • Page 95 REVISIONS *The manual number is given on the bottom left of the back cover. Print Date *Manual Number Revision May 2016 IB(NA)-0600641ENG-A First edition IB(NA)-0600641ENG-A...
  • Page 96 INVERTER HEAD OFFICE: TOKYO BUILDING 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN IB(NA)-0600641ENG-A(1605) MEE Printed in Japan Specifications subject to change without notice.

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