Communications Protocol; Introduction To Command List - Hitachi SJ300 Series Instruction Manual

Communications Protocol

Introduction to
The network master sends a frame to initiate
Command List 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.
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).
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
Host
(master)
Inverter
(slave)
Description
SJ300 Inverter
frame
wait
time
frame
User-selectable
✔
✔
✔
—
—
—
—
✔
✔
—
✔
✔
B–5