www.miinet.com
Moore Industries-International, Inc.
- 117 -
User’s Manual
238-741-00K
May 2019
Programmable Smart HART Temperature Transmitter
THZ
3
/ TDZ
3
SECTION 6
HART Status Registers
The THZ3/TDZ3 provides the following status registers per the HART standards.
Field Device Status
A byte indicating the “current operating status of the field device”.
Among the bits are “Device Malfunction” and “More Status Available”
This status is returned in the response to every HART command.
Additional Status
15 bytes containing system and diagnostic status information. This
status is returned by Universal Command 48: Read Additional
Device
Status.
Device Variable Status A byte associated with each Device Variable which indicates Quality
and Limited Status. This status is returned by Universal Command 9:
Read Device Variable with Status.
Field Device Status Byte
A byte indicating the “current operating status of the field device”. This status is returned in the
response to every HART command.
0
1
2
3
4
5
6
7
Primary variable out of limits - The PV is beyond its operating limit
Non primary variable out of limits -A Device Variable not mapped to the PV
is beyond its operating limits
Loop Current Saturated – The Loop Current has reached its upper (or lower) endpoint
limit and cannot increase (or decrease) and further
Loop Current Fixed – The Loop Current is being held at a fixed value and is not
responding to process variations
More Status Available – More status information is available via Command 48, Read
Additional Status Information
Cold Start – A power failure of Device Reset has occurred
Configuration Changed – An operation was performed that changed the device’s
configuration
Device Malfunction – The device detected a serious error or failure that compromises
device operation
Bit
Description
Table 6.4
TDZ
3
or THZ
3
Field Device Status Bits
