11-25
11.9.8 PKW regional access parameters
The driver can provide request and response information. Due to the request and
response mechanism, the master station must send requests until a communication
response is received. The 4 characters of the PKW region are as follows:
Word 1 Parameter ID(PKE)
bit 15 12 11 0
AK Parameter number(PNU)
Word 2 IND Reserved
Word 3 PWE1
bit 15 8 7 0
Reserved Fault number
Word 4
PWE2 Read/Write parameters
PKE
Bit 0~11 (PNU): Parameter address/MODBUS address that includes related parameters.
Parameter address/MODBUS address: Please refer to the MODBUS communication
protocol description chapter in the driver manual for the register numbers, registers and
data format that corresponds to the operation parameters.
Bit 12~15 (AK): Includes the identification characters of requests or responses.
Request character AK
PLC master station driver slave station
Request Identifier Description
0
No request
1
Read parameter value
2
Modify parameter value
Response character AK
Driver slave station PLC master station
Request Identifier Description
0
No response
1
Request parameter value processed
7
Request parameter value cannot process