Spectrum Controls 1756sc-OF8H Series A - Manual (Page 101)

Chapter 7: HART Channel Configuration, Data, and Status 87
receiving Command 0, but for simplicity, we'll track update of the
device information as a whole.
• All other conditioned not generating INITIATE.
After the pass-through response is sent with a valid handle and a response
value indicating (33) INITIATE, the user can retrieve the data associated
with the handle using the following command message.
Table 7.14 (HART Pass-Through Command Complete Query)
HART pass through command complete query - command message packet structure
Field Value Definition
Unconnected Message Header
HART Channel Number
0x00 – 0x07 (1 byte) Module input channel number for HART
command
Command Number 0x0C (1 byte) The command number
Handle (1 byte)
1-255
The handle from command request reply
If the data associated with the handle is not yet available, or invalid, the
following reply message will be returned.
Table 7.15 (HART Pass-Through Command Complete Query Reply)
HART pass through command complete query - reply packet structure
Field
Value Definition
Unconnected Message Header
HART Channel Number
0x00 – 0x07 (1 byte) Module input channel
number for HART
command
Status (1 byte)
34 = RUNNING
35 = DEAD (bad request)
Command status
Count (1 byte) Length of Handle +
HART Response Data in
bytes (if Success)
Handle (1 byte) The handle from
command complete query
When data associated with the buffer becomes available, meaning a
"success" response, the reply will be formatted as follows: