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APPENDIX B
B.6 DEFINITION OF COMMUNICATION DATA ADDRESS
B.6.1 Parameter Data
DEFINITION OF COMMUNICATION DATA ADDRESS AND MODBUS COMMUNICATION PROTOCOL
The drive supports four communication protocols (Modbus-RTU, CANopen, CANlink,
and PROFIBUS-DP2). The user-programmable card and point-to-point communication are a
derivation of CANlink protocol. The host computer can implement control such as monitoring
and parameter viewing and modification on the AC drive through their protocols.
The drive’s communication data is classified into parameter data and non-parameter data.
The non-parameter data includes running commands, running status, running parameters
and alarm information.
The parameter data provides important parameters of the AC drive. In addition to function
parameter group F the drive includes the function parameter group A.
The parameter data is described as below:
Benshaw PowerPro
™
High
Performance Single AC
Drive Parameter Data
Group F (read-write)
F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, FA, FB, FC, FD, FE, FF
Group A (read-write)
A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, AA, AB, AC, AD, AE, AF
Communication addresses of parameter data are defined as follows:
1. Read Function code by communication
For groups F0 to FF and A0 to AF, the high 16 bits of the communication address indicate
the group number and the low 16 bits indicate the parameter number in the group.
Example: Communication address of F0-16 is F010H, where F0H represents group F0
and 10H is the hexadecimal data format of serial number 16 in the group.
Communication address of AC-08 is AC08H, where ACH represents group AC and 08H
is the hexadecimal data format of serial number 8 in the group.
2. Write Function code by communication
For groups F0 to FF, whether the high 16 bits in communication address are 00 to 0F or
F0 to FF is decided by whether the high 16 bits are written to EEPROM. The low 16 bits
indicate parameter number in the group. Example:
F0-16:
If it does not need to be written to EEPROM, communication address is 0010H.
If it needs to be written to EEPROM, communication address is F010H.
For groups A0 to AF, whether the high 16 bits in communication address are 40 to 0F or
A0 to AF is decided by whether the high 16 bits are written to EEPROM. The low 16 bits
indicate parameter number in the group. Example:
AC-08:
If it does not need to be written to EEPROM, communication address is 4C08H.
If it needs to be written to EEPROM, communication address is AC08H.
