Motorola 68P02958C00-B - Manual (Page 452)

Error Messages
C-160
Error #972: MODBUSTS module, Function %%
The FLUSH function failed, but continuing
May indicate system software problem. Consult product group.
Error #973: MODBUSTS module, Function %%
The Set Parameters function failed, but continuing
May indicate system software problem. Consult product group.
Error #974: MODBUSTS module, Function %%
The size of MODBUS format reply is too large or too small
The master should not send frames or poll for frames longer than 140 bytes.
Error #975: MODBUSTS module, Function %%
MODBUS to RTU PLC format translation of reply failed !!
May indicate system software problem. Consult product group.
Error #976: MODBUSTS module, Function %%
No support for broadcast. Frame ignored
No support for broadcast frames in MODBUS protocol.
Error #977: MODBUSTS module, Function %%
The CRC of MODBUS control frame is not correct !
Consult product group.
Error #978: MODBUSTS module, Function %%
The control frame in MODBUS format is too long for the module or is too short !
The master should not send frames or poll for frames longer than 140 bytes.
Error #979: MODBUSTS module, Function %%
The control frame in RTU PLC format is too long for the module or is too short !
The master should not send frames or poll for frames longer than 140 bytes.
Error #980: MODBUSTS module, Function %%
Illegal opcode (command) in RTU PLC format control !
May indicate system software problem. Consult product group.
Error #981: MODBUSTS module, Function %%
Pure data in Poll control. No data must appear in this control !!
May indicate system software problem. Consult product group.