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CN8240 & CN8260 Series Communications & Options
7
TYPE character Message Type
R Read Request or Read
Response Returning a Positive Result
r Read Response Returning a Negative Result
W Write Positive Value Request and Response
w Write Negative Value Request and Response
A Auxiliary Command
Digital
Communications Option
For further information, see following sections on the different message types.
Type
This is a single character identifying the type of message. The following table lists the type characters for all messages.
ERROR
Code Description
0 No error.
1 Framing error.
2 Hardware error.
3 Parity error.
4 Bad character in the TYPE field.
5 Bad message. Message cannot be understood.
6 Bad checksum. The checksum received
did not match the checksum of the message.
7 Bad zone ID.
8 Bad auxiliary command ID. The auxiliary
command is not supported in this controller.
9 Bad parameter ID. The parameter is not
supported in this controller.
A Bad data. Bad representation in the data field
or data is out of range.
B Attempt to write to a read only parameter.
C Cannot write to a parameter because it’s in use.
PARAM
This is a two character, message specific, parameter ID. For a Read/Write Request or Response message, this
ID identifies the controller parameter. For an Auxiliary Command Request or Response message, this ID specifies
the command.
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