User`s manual

B-4 Motion Mate™ DSM314 for Series 90™-30 PLCs User's Manual – January 2001 GFK-1742A
B
Table B-1. DSM COMM REQ Status Word Codes
DSM COMM REQ Status Word Codes
Code Name Code
#
Description Possible Corrective Action
IOB_SUCCESS 1 All communications proceeded
normally.
None required.
IOB_PARITY_ERR -1 A parity error occurred while
communicating with an
expansion rack.
Retry. Check hardware –
expansion cables, DSM
module, etc.
IOB_NOT_COMPL -2 After the communication was
over, the module did not
indicate that it was complete.
Retry. Verify the COMM REQ
parameters.
IOB_MOD_ABORT -3 The module aborted the
communication.
Retry. Verify the COMM REQ
parameters.
IOB_MOD_SYNTAX -4 The module indicated that the
data sent was not in the correct
sequence.
Verify the COMM REQ
parameters.
IOB_NOT_RDY -5 The RDY bit in the module’s
status was not active.
Retry. Check DSM module.
IOB_TIMEOUT -6 The maximum response time
elapsed without receiving a
response from the module.
Check DSM module. Verify
the COMM REQ parameters.
IOB_BAD_PARAM -7 One of the parameters passed
was invalid.
Verify the COMM REQ
parameters.
IOB_BAD_CSUM -8 The checksum received from the
DMA protocol module did not
match the data received.
Retry. Check installation for
proper grounding, shielding,
noise suppression, etc.
IOB_OUT_LEN_CHGD -9 The output length for the
module was changed, so normal
processing of the reply record
should not be performed.
Verify the COMM REQ
parameters.
Corrective Action
The type of corrective action to take depends upon the application. If an error occurs during the
startup or debugging stage of ladder development, the advice to “Verify the COMM REQ
parameters” is appropriate. The same is true if an error occurs right after a program is modified.
But, if an error occurs in a proven application that has been running successfully, the problem is
more likely to be hardware-related. The PLC fault tables should be checked for possible
additional information when troubleshooting Status Word errors.