Parker AC30 - User-Defined Parameter Mapping

A-5 Modbus TCP
AC30 series Variable Speed Inverter
User-Defined Parameter Mapping
The inverter parameters may be mapped to the user-defined register area (00001 – 00256). This allows parameters to be grouped together so
that they may be accessed through a single Modbus request.
To map parameters add the required parameter numbers to the user mapping table using parameter 1567 Modbus Mapping. The following
applies:
 The mapping starts at register 00001.
 Any valid fixed or application parameter may be added excluding password parameters and parameter arrays - individual elements of the
array may be added however.
 Parameter strings may be added.
 The mapping ends on the first mapping entry of zero or when the mapping table is full.
Note: The mapping may be modified at any time. However no Modbus requests should be made when the mapping is being modified to avoid
indeterminate response data.
Unlike the fixed mapping, the user-defined parameter mapping will only use as many registers as necessary to accommodate the parameter. An
example is given below:
Mapping Table
Parameter Name
Data Type
No. of Registers
Start Register
End Register
0
0627 Comms Control Word
WORD
1
00001
00001
1
0681 Comms Reference
REAL
2
00002
00003
2
0696 First Trip
USINT
1
00004
00004
3
0661 Status Word
WORD
1
00005
00005
4
0395 Actual Speed Percent
REAL
2
00006
00007
5
0961 Drive Name
23-character STRING
12
00008
00019
6
0000
The mapping table is continually checked for valid entries. The diagnostic parameter 1632 Mapping Valid will be TRUE if all entries in the table
are valid parameters. If the diagnostic parameter is FALSE, meaning there are invalid entries, then Modbus requests are still accepted but the
invalid entries will be skipped over and will occupy no registers in the mapping.