Allen-Bradley Powermonitor 3000 User Manual page 88

4-28 Communications
Publication 1404-UM001D-EN-E - October 2004
Error Description
Code
0 No error.
1 Function Code
cannot Broadcast.
2 Function Code not
supported.
3 Bad Command
Length
4 Bad Length
5 Bad Parameter
6 Bad Table
Number
7 Bad Modbus
Address
8 Table Write
Protected
9 Table Access
Denied
If a client device requests too large a data size, the Powermonitor
3000 returns the requested data padded with zeroes up to the
requested data size rather than returning an error.
When Table A.30 User-Configured Table Setup is used together with
Modbus, the value for element 1 should be 1000.
The value for element 0 of Table A.32 Write Error Status will be the
first Modbus address of data table written to last.
For function code 03, 04 and 16, the number of words of user data is
limited to 100. If it is over 100, exception code 3 will be returned to
the master and error code 3 occurs.
For function code 16, if the data length is larger or less than the
element number of the data table accessed, error code 4 will occur. It
means the data length for function code 16 should be strictly the same
as the size of the accessed data table.
If the data written to Powermonitor 3000 by using function code 16 is
outside of the legal range as shown in Appendix A, error code 5 will
occur.
Meaning
The function does not support Broadcast.
The controller does not support this
Modbus function or sub-function.
The Modbus Command is the wrong size.
The function attempted to read/write past
the end of a data file.
The function cannot be executed with
these parameters.
The table number does not exist.
The function attempted to access an
invalid Modbus address.
The function attempted to write to a
read-only table.
Access to this table is not granted.
Response
Exception
Code
None.
Nothing
transmitted
1
3
3
3
2
3
3
2