Ascii Mode Communications - Hitachi SJ7002 Series Instruction Manual
Sj7002 series
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Also See for SJ7002 Series:
- Instruction manual (390 pages) ,
- Service manual (81 pages) ,
- Connection manual (47 pages)
Table of Contents
ASCII Mode Communications
Introduction to
Command List
Command – 00
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The network master sends a frame to
initiate communications with a slave, as
shown in the figure to the right. After
the set waiting time (per parameter
C078, the inverter responds.
The following table lists the commands (single-character codes) sent to a particular device on
the network. Some commands may be broadcast to all devices on the network.
Command
Code
00
Forward / Reverse / Stop command
01
Setting of frequency in standard profile
02
Setting of intelligent terminal state
03
Read all monitor data (block read)
04
Read inverter status
05
Read trip history
06
Read a single parameter value
07
Write a single parameter value
08
Set inverter parameters to default values
09
Verifies that the requested setting can be
written to EEPROM.
0A
Writes a parameter value to EEPROM
0B
Requests the recalculation of internal constant
NOTE: Use of command 08 – set inverter parameters to default values first requires setting the
initialization mode parameter B084 to 01 (initializes parameters only) or 02 (initializes param-
eters and clears the trip history).
The 00 command controls the Forward, Reverse, and Stop mode of the inverter. You must set
parameter A002=03 in order for serial communications control of the inverter to apply.
The frame format of command 00 follows the
timing diagram and specification table.
Transmitting
device:
Host
(master)
C078
Inverter
(slave)
Description
Frame format
STX Node
SJ700
Inverter
2
frame
wait
time
frame
Broadcast to
all devices
✔
✔
✔
—
—
—
—
✔
✔
—
✔
✔
Command
Data
BCC [CR]
B–5
Table of Contents
Troubleshooting
