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RS485 Protocol C-7
C.6.2.5 Acknowledge Response:
Total bytes = 7 + n * 4 = Max 39
Note: When Request for Write and Acknowledge Response is exchanged between
PC and Inverter for the first time, previous data is returned. From subsequent
transmissions, the current data will be returned.
C.6.2.6 Negative Response:
Total bytes = 9
C.6.2.7 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)
Total bytes = 8 + n * 4 = Max 40
C.6.2.8 Acknowledge Response:
Total bytes = 7
C.6.2.9 Negative Acknowledge Response:
Total bytes = 9
ACK Drive No CMD Data SUM EOT
06h “01” to “1F” “W” “XXXX…” “XX” 04h
1:byte 2:bytes 1:byte n * 4 bytes 2 bytes 1
NAK Drive No CMD Error code SUM EOT
15h “01” to “1F” “W” “**” “XX” 04h
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1
ENQ Drive No CMD Number of address to
read
Addres
s
SUM EOT
05h “01” to “X” “1” to “8”=n “XXXX “XX” 04h
1 byte 2 bytes 1 1 byte n * 4 2 byte 1
ACK Drive No CMD SUM EOT
06h “01” to “1F” “X” “XX” 04h
1 byte 2 bytes 1 byte 2 bytes 1 byte
NAK Drive No CMD Error code SUM EOT
15h “01” to “1F” “X” “**” “XX” 04h
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte