Inovance MD520 Series - Page 152

PROFIBUS DP Communication
‑151‑
PKW Data Sent by the Master PKW Data Returned by the AC Drive
PKE
● High‑order 4 bits:
Command code0: No
request1: Read parameter
data2: Modify parameter
data (The preceding
command code is in
decimal format.)
● Low‑order 4 bits: Reserved
● Low‑order 8 bits: High‑
order bits of the parameter
address
PKE
● High‑order 4 bits: Response code0: No
request1: Operation succeeded7:
Operation failed
● Low‑order 8 bits: High‑order bits of
the parameter address
IND
High‑order 8 bits: Low‑order
bits of the parameter address
Low‑order 8 bits: Reserved
IND
High‑order 8 bits: Low‑order bits of the
parameter address
Low‑order 8 bits: Reserved
PWE
High‑order 16 bits: Reserved
Low‑order 16 bits: Parameter
value (write request) or not
used (read request)
PWE
● Request succeeded: Parameter value
● Request failed: Error code (consistent
with standard Modbus)1: Invalid
command2: Invalid address3: Invalid
data4: Other error
Application
The following figure shows the PKW data sent by the master and PKW response data
returned by the AC drive when the master reads the AC drive parameter F0‑08.
Figure 7‑7 Example PKW data sent by the master when reading an AC drive parameter
The following figure shows the PKW data sent by the master and PKW response data
returned by the AC drive when the master modifies the AC drive parameter F0‑08.