Table 3-5 Response Message Fields Definitions - Honeywell UDC2300 Product Manual

3.5 Response Messages,
Response message
field Information
24 RS422/485 ASCII Communications Option Product Manual
Table 3-5 is a list of the information contained in the response message
and their definitions.
Table 3-5 Response Message Fields Definitions
Type of
Information
Request Message A two-digit code that indicates whether or not the present
Status Code request message was successfully processed. For
detailed explanations and recovery procedures for these
codes, refer to 'Request Message Status Codes" in this
section.
UDC Status Code A two-digit code that indicates whether or not the UDC
controller addressed is working correctly and has
performed the requested operation. For detailed
explanations and recovery procedures for these codes,
refer to "UDC Status Codes" in this section.
UDC State and A hexadecimal number that indicates whether the UDC
Mode controller's present state is "Slave" or "Monitor" and
whether it is in Manual or Automatic mode using the
Local setpoint or Remote setpoint.
Any change made in UDC State or Control mode will
not be indicated in the response until the next
transaction.
Alarm Status A hexadecimal number that indicates the status of Alarm
#1 and #2 or both. It indicates when the Alarm is on or
has changed state since last communication. The change
of state indicator is a backup to the on/off state indicator.
If an alarm goes from off to on then off in between
consecutive communications, the on/off would not show
it. The change of state flag would show that it had
happened.
Data Field This field always returns the identifying number for the
parameter in the request message and the value for that
parameter (either an integer or field floating decimal
point).
Optional This field is a one byte hexadecimal value (two ASCII
Checksum Field characters) representing the binary sum, ignoring carries,
generated by adding the ASCII code for each character
of the response message, ignoring parity, up to but not
including the checksum. It is returned for 4204 requests
only. See "Checksum Protocol" in this section.
Continued
Definition
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