LSIS iG5H Series, Manual

Page: 193 / 225

RS485 communication
180
Note
When Request for Write and Acknowledge Response is exchanged between PC and
Inverter for the first time, previous data is returned. From the second time of
transmission, the current data will be returned.
2.2) Negative response:
NAK Drive No CMD Error code SUM EOT
15h
“01” - “1F” “W” “**” “XX”
04h
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte
Total bite = 9
3) Request for Monitor Register
This is useful when constant parameter monitoring and data updates are required.
Request for Register of
‘n’ numbers of Address (not consecutive)
ENQ Drive No CMD
Number of
address to read
Address SUM EOT
05h
“01” - “1F” “X” “1” - “8”=n “XXXX…” “XX”
04h
1 byte 2 bytes 1 byte 1 byte n * 4 byte 2 byte 1 byte
Total bite = 8 + n * 4 = Max 40
3.1) Acknowledge Response:
ACK Drive No CMD SUM EOT
06h
“01” - “1F” “X” “XX”
04h
1 byte 2 bytes 1 byte 2 bytes 1 byte
Total bite = 7
3.2) Negative Acknowledge Response:
NAK Drive No CMD Error code SUM EOT
15h
“01” - “1F” “X” “**” “XX”
04h
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte
Total bite = 9
4) Action Request for monitor register: Request for read of address registered by
monitor register.
ENQ Drive No CMD SUM EOT
05h
“01” - “1F” “Y” “XX”
04h
1 byte 2 bytes 1 byte 2 bytes 1 byte
Total bite = 7
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