Hitachi SJ300-037HFE Welding System User Manual


 
SJ300 Inverter
Appendix B
B–5
Communications Protocol
Introduction to
Command List
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.
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
Description User-selectable
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)
wait
time
frame
Inverter
(slave)
frame