Error response – West Control Solutions N8100 User Manual
Page 36
3.4
ERROR RESPONSE
The circumstances under which a message received from the master device is
ignored are:
Parity error detected
Syntax error detected
Timeout elapsed
Receipt of a Type 4 message without a preceding Type 3 command
message.
Negative acknowledgements will be returned if, in spite of the received message
being notionally correct, the Controller cannot supply the requested information
or perform the requested operation. The {DATA} element of a negative
acknowledgement will be indeterminate.
3-10
O054-3
59125
Figure 3-1
Controller Status Byte