Hitachi Hidic EH-150 EH-OLNK Applications Manual
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Hitachi Hidic EH-150 EH-OLNK Applications Manual

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HITACHI PROGRAMMABLE CONTROLLER
Optical Type CPU LINK MODULE (EH-OLNK)
APPLICATION MANUAL
NJI-395(X)
Table of Contents
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Summary of Contents for Hitachi Hidic EH-150 EH-OLNK

  • Page 1 HITACHI PROGRAMMABLE CONTROLLER Optical Type CPU LINK MODULE (EH-OLNK) APPLICATION MANUAL NJI-395(X)
  • Page 2 If you have any questions regarding the warranty please contact either your supplier or the local Hitachi Distributor. (Depending on failure part, examination might be impossible.)
  • Page 3 Safety Precautions Read this manual and related documents thoroughly before installing, operating, performing preventive maintenance or performing inspection, and be sure to use the unit correctly. Use this product after acquiring adequate knowledge of the unit, all safety information, and all cautionary information. Also, make sure this manual enters the possession of the chief person in charge of safety maintenance.
  • Page 4 1. Attachments CAUTION • To be used in environments stipulated in the catalogue and in this document. Usage in environments that subject the equipment to high temperatures, high humidity, dirt and dust, corrosive gas, vibrations and shocks may result in electric shocks, the outbreak of fire and malfunctions.

  • Page 5: Table Of Contents

    CONTENTS Chapter 1. Foreword 1-1 to 1-2 Before use............................1-1 Precautions during use........................1-2 Usable CPU modules ........................1-2 Chapter 2. Specifications 2-1 to 2-2 General specifications ........................2-1 Function specifications ........................2-1 Transmission specifications......................2-1 Defference with upper H series equipment..................2-2 Chapter 3.
  • Page 6 Appendix. Processing the ends of the coaxial cable A-1 to A -3 Appendix.1. CA Connector ASSY The designated method in the purchase ..........A -1 Appendix.2. General precautions in handling optical fiber cables ............A -3 Appendix.3. The method to measure the optical loss level ..............A -3...

  • Page 7: Chapter 1. Foreword 1-1 To

    Chapter 1. Foreword Chapter 1 Foreword Thank you for using the Hitachi EH-150 Programmable Controller series (hereinafter known as the PLC.) This manual explains how to use the optical type CPU link module (hereinafter known as the EH-OLNK) with the Hitachi EH-150 Programmable Controller.

  • Page 8: Precautions During Use

    Ve r s i o n RO M V E R . ** M FG . N O ****** M A D E I N J A P A N Hitachi,Ltd. Tokyo Japan Side view of the CPU module Figure 1.1 CPU ROM version display...

  • Page 9: Chapter 2. Specifications 2-1 To

    Chapter 2. Specifications Chapter 2 Specifications General specifications Table 2.1 General specifications Item Specification 0 to 55 °C Operating temperature -10 to 75 °C Preserving temperature Operating humidity No condensation 20 to 90% RH Preserving humidity No condensation 10 to 90% RH Current consumption 5V DC approx.
  • Page 10 Chapter 2. Specifications Differences with upper level H series equipment Table 2.4 shows the differences between the EH-OLNK and the OLINK-SH CPU link module (single-slot, optical cable) and the OLINK-H (twin-slot, optical cable) for use with large upper level H series equipment. Table 2.4 Differences with upper level H series equipment Item EH-OLNK...

  • Page 11: Chapter 3. Configuration 3-1 To

    Chapter 3. Configuration Chapter 3 Configuration Part names and functions EH-OLNK Name and function of each part Type Approx. 0.15 kg 1] Lock button Weight Dimensions(mm) 2] Module information display 3] Station No. setting switch (10-digits) 4] Station No. setting switch (1-digits) 5] Error display clearance switch 6] Reset switch...

  • Page 12: Module Information Display Led

    Chapter 3. Configuration Module information display LED Descriptions of the module information display for all LEDs are provided in table 3.1. Table 3.1 Module Status display LED Outlook Name Color Contents Green Blinking when data is being transmitted. CPU LINK EH-OLNK Green Blinking when data is being received.

  • Page 13: Chapter 4. Basic Cpu Link Operations 4-1 To

    Chapter 4. Basic CPU Link Operations Chapter 4 Basic CPU Link Operations System Configuration An example of the optical type CPU link module configuration is shown is figure 4.1. It is possible to connect up the EH-OLNK together with upper level H series CPU link modules (OLINK-H, OLINK-SH) As indicated in figure 4.1, it is possible to use both upper level H series optical type CPU link modules and CPU modules in a link system loop.

  • Page 14: Cpu Link Functions

    Chapter 4. Basic CPU Link Operations CPU link functions A transmission area and a receiving area are assigned to the CPU's link area, and all link operations are performed via these areas. The link areas can be assigned arbitrarily in units of 16 points (1 word) for each CPU.
  • Page 15 Chapter 4. Basic CPU Link Operations 2) Link area identification When two optical type CPU link modules have been installed, the first and second link areas are identified in accordance with their installation position. The slots are counted in 0, 1, 2 sequence from the right-hand side of the CPU, and the CPU link module with the smallest number is assigned as the first unit, with the other unit assigned as the second CPU link module.
  • Page 16 Chapter 4. Basic CPU Link Operations 3) Precautions related to assignment duplication Link areas assigned in local stations will become the areas for transmitting to other stations, and the remaining area will become the area for receiving from other stations, in accordance with link area assignment.

  • Page 17: Function For Accessing Other Stations

    Chapter 4. Basic CPU Link Operations Function for accessing other stations It is possible to read, white and control the operations of monitor programs for other stations from peripheral devices connected to the CPU via the optical type CPU link module. An example of this is shown in figure 4.6.

  • Page 18: Method Of Confirming Link Data Validation

    Chapter 4. Basic CPU Link Operations Method of confirming link data validation 4.5.1 Link Error Flag Area When reading area data assigned to other stations, it is necessary to confirm that each station's link module is operating normally and that the CPU is running correctly at the very least. The method for doing this is by monitoring the link operation station flags (WRF05E to WRF08E and WRF145 to WFR148) and the CPU status flags (WRF0E9 to WRF0F8 and WRF149 to WFR158) and confirming all are set at ON (normal operations) before reading the assigned area data.
  • Page 19 Chapter 4. Basic CPU Link Operations...

  • Page 20: Example Of Effective Check Of Link Data

    Chapter 4. Basic CPU Link Operations 4.5.2 Example of Effective check of Link Data Figure 4.7 shows the example which CPU module of link station No.0 checks the effective of link data (receive area) from other stations. ST32 ST63 Figure 4.7 CPU link configuration R7E4 WM0 :ST.

  • Page 21: Chapter 5. Installation And Start-Up 5-1 To

    Chapter 5. Installation and start-up Chapter 5 Installation and start-up Installation 5.1.1 Installation position The available slot for EH-OLNK is slot 0, 1 or 2 of basic base at maximum 2 times. Slot No. Available slot 2 units can be mounted at maximum. Slot No.

  • Page 22: Loading The Module

    Chapter 5. Installation and start-up 5.1.2 Loading the Module (1) Installing 1] Hook the claw at the lower section of the module to the hole in the base. 2] Press in the upper side of the module until it clicks. Note 1: After loading the module, check to make sure it does not come out.

  • Page 23: The Supply Of 5Vdc For The Bypass Function

    Chapter 5. Installation and start-up 5.1.4 The supply of 5VDC for the bypass function Even if a power supply is turned off, the optical CPU link module equips the bypass function not to make a link system decline. You must supply 5VDC (No power failure) to the connector for the 5VDC supply from the outside to make a bypass function effective.

  • Page 24: Start-Up

    Chapter 5. Installation and start-up Start-up The procedure for starting up a link system is explained below. 1. Although there are no restrictions on the order in which the power supply to each station must be switched on when starting up a link system, link operations will not commence until the power has been switched on to station No.0 (the master station.) Create the program used for controlling and computing the link data after the master station's participation flag has been set at ON.

  • Page 25: Errors

    Chapter 6. Errors and error recovery Chapter 6 Errors and error recovery Errors If an error occurs with the optical link module or an abnormality arises with the transmission route, the status display LED will indicate the error. The error information will also be set in the special CPU internal output related to the relevant link module (R7DE, WRF007, WRF0E0 to WRF19F.) "1"...

  • Page 26: Error Displays

    Chapter 6. Errors and error recovery Error displays The LED displays when the following errors occur are explained below. (1) Normal operations (LED display status and module status) Status of LED indication & Condition of Link Module CPU LINK EH-OLNK The RUN LED lights.

  • Page 27: Troubleshooting

    Chapter 6. Errors and error recovery Troubleshooting This section provides a flowchart on the procedures for troubleshooting when recovering errors and when errors occur. As the EH-OLNK is equipped with e bypass function, it is possible to replace modules with units other than link modules without amending the architecture of the link system.
  • Page 28 Chapter 6. Errors and error recovery (2) Transmission route cut-off ERR LED - Error information of own station : bit8 ON Flicker at 0.5 sec intervals - Cut-off station No. : bit0 to bit7 * The local station error information Check to ascertain if the transmission route has been cut off.
  • Page 29 Chapter 6. Errors and error recovery Duplicated station No.s ERR LED - Error information of own station : Flicker at 0.5 sec intervals bit8 to b11 all OFF Check to ascertain if there is a station sharing the same station No. as the one displaying an error.
  • Page 30 Chapter 6. Errors and error recovery (5) Link area assignment duplication ERR LED - Error information of own station : bit9 ON Flicker at 0.5 sec intervals Check to ascertain if the ERR LED on other stations illuminated blinking. Is the ERR LED on other stations illuminated or blinking? Set the value so that the link area assignment is not duplicated.
  • Page 31 Chapter 6. Errors and error recovery (7) Transmission error (CRC error, overrun) ERR LED - Error information of each station : bit14 ON Flicker at 1 sec intervals Run a loop-back check (refer to section 7.3.) Has an error occurred in the loop-back check? Does it happen frequently? It may be assumed that this is a...
  • Page 32 Chapter 6. Errors and error recovery (8) Peripheral data receiving time-out, sum error, address error, response time-out ERR LED - Error information of own station : bit13 ON - Error information of each station : bit13 ON Flicker at 1 sec intervals - Error information of own station : bit13 ON - Error information of each station : bit15 ON Run a loop-back check (refer to...

  • Page 33: Chapter 7. Maintenance And Inspections 7-1 To

    Chapter 7. Maintenance and Inspections Chapter 7 Maintenance and Inspections Daily inspections Check the following items to ensure the operational status of the equipment. Refer to Chapter 6 (Error Displays and Troubleshooting) for further details on errors. Table 7.1 Daily inspection items Item Normal Abnormal...

  • Page 34: Loop-Back Check

    Chapter 7. Maintenance and Inspections Loop-back check Run a loop-back check in accordance with the procedure explained below when normal operations are not possible during test operations of the link system, and when errors occur after start-up, resulting in link system operations being suspended.
  • Page 35 Appendix Optical Cable Appendix.1 CA Connector ASSY The designated method in the purchase HITACHI recommends the optical fiber cable specified as follows, which is produced by JAPAN OPNEXT. Refer to the following model code for ordering. Product Name : CA7103 – [1]M – [2]L[3]1...
  • Page 36 Appendix Optical Cable Cable section structure Kind of a cable Section structure Type A Optical fiber core Reinforcement fiber External sheath Optical fiber core Type B Reinforcement fiber External sheath(I) Cushion layer External sheath (II) Type C Optical fiber core Reinforcement fiber External sheath (I) Cushion layer...
  • Page 37 Appendix Optical Cable Appendix.2 General precautions in handling optical fiber cables You might break the fibers of optical fiber cables if you handle the cables in the same way as conventional cables. To prevent this, observe the following precautions. (1) Do not bend the cables excessively. The bending radius must be more than 10 times the outer diameter during installation;...
  • Page 38 Appendix Optical Cable RANGE HOLD 850 nm Fig. A.1 Arrange of the switch for optical meter setting [2] Measure the optical cable ( Standard length: 1 to 2 m ) B Standard measurement level ( A Translate，B Receive ) Standard optical cable A Standard measurement level ( A Receive，B Translate ) [3] Measurement of optical cable of measurement target...

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