Spectrum Controls 1734sc-OE2CIH - Manual (Page 57)

Chapter 4: OE2CIH and HART 4-21
User’s Manual Pub. 0300272-01 Rev. A.0
Request Failed Reply
HART Read Additional Status - Reply packet structure
Reply Size = 2
Offset Field Value Definition
0 Status 34 = DR_RUNNING
(No Device or
connection process
not completed or re-
gathering device
info is in progress)
35 = DR_DEAD
(Channel is not HART
enabled) Command status
1 Pad 0 Pad byte
Request Succeeded Reply
HART Read Extended Status - Reply packet structure
Instance n Reply Size = 2-28 bytes
(pad byte may be attached to end for 16 bit alignment)
Instance 0 Reply Size = 28*n
Note: Sending this message with Instance = 0 will reset the NewAdditionalStatus tag.
Offset Field Value Definition
0 Status 00 = SUCCESS (1 byte) Command status
1 Count 0-25 (1 byte) Number of Status bytes available
2-26 Additional
Status Bytes Additional Status bytes returned by
Command 48
For Class Instance(Instance=0) if
device doesn’t return any or all 25
bytes then the remaining are set to
0.
27 Pad 0 Included if all 25 Additional Status
bytes returned or returning all n
Channels at once for Instance 0