Chapter 9 – RS485 Communication
9-6
2.2) Negative response:
NAK Inverter No. CMD Error code SUM EOT
15h “01” ~ “FA” “W” “**” “XX” 04h
1 byte 2 byte 1 byte 2 byte 2 byte 1 byte
Total byte = 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 (non-successive)
ENQ Inverter No. CMD Number of Address Address SUM EOT
05h “01” ~ “FA” “X” “1” ~ “8”=n “XXXX…” “XX” 04h
1 byte 2 byte 1 byte 1 byte n * 4 byte 2 byte 1 byte
Total byte = 8 + n * 4 = Max 40
3.1) Acknowledge Response:
ACK Inverter No. CMD SUM EOT
06h “01” ~ “FA” “X” “XX” 04h
1 byte 2 byte 1 byte 2 byte 1 byte
Total byte = 7
3.2) Negative Acknowledge Response:
NAK Inverter No. CMD Error code SUM EOT
15h “01” ~ “FA” “X” “**” “XX” 04h
1 byte 2 byte 1 byte 2 byte 2 byte 1 byte
Total byte = 9
4) Action Request for monitor register: Request for read of address registered by monitor register.
ENQ Inverter No. CMD SUM EOT
05h “01” ~ “FA” “Y” “XX” 04h
1 byte 2 byte 1 byte 2 byte 1 byte
Total byte = 7
4.1) Acknowledge response:
ACK Inverter No. CMD Data SUM EOT
06h “01” ~ “FA” “Y” “XXXX…” “XX” 04h
1 byte 2 byte 1 byte n * 4 byte 2 byte 1 byte
Total byte = 7 + n * 4 = Max 39
4.2) Negative response:
NAK Inverter No. CMD Error code SUM EOT
15h “01” ~ “FA” “Y” “**” “XX” 04h
1 byte 2 byte 1 byte 2 byte 2 byte 1 byte
Total byte = 9
* Request for Monitor Register should be made before Action Request for monitor register. If inverter
power is turned off, monitor register is cleared so redo the request for monitor register when Power ON.
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