3 dynamic variables, 4 device variables, 2 field device status – Flowserve MX HART Field Unit User Manual
Page 20: 1 supported device variables
MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14
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3.2.2 Field Device Status
The Field Device Status is contained in the second data byte in a Slave-to-Master frame as a bit field table. It indicates
the current operating status of the field device as a whole and is not associated with the completion of any command.
Table 3.3 – Field Device Status
Bit Mask
Description
0x01
Primary Variable Out of Limits – The PV is beyond its operating limit.
0x02
Non-Primary Variable Out of Limits – A device variable not mapped to PV is beyond its operating limits.
0x04
Loop Current Saturated – The loop current has reached its upper (or lower) endpoint limit and cannot increase (or
decrease) any further.
0x08
Loop Current Fixed – The loop current is being held at a fixed value and is not responding to process variations.
0x10
More Status Available – More status information is available via Command 48, Read Additional Status Information.
0x20
Cold Start – A power failure or Device Reset has occurred.
0x40
Configuration Changed – An operation was performed that changed the device’s configuration.
0x80
Device Malfunction – The device detected a serious error or a failure that compromises device operation.
3.3 Dynamic Variables
The Limitorque HART actuator device supports the following Dynamic Variables:
Table 3.4 – Supported Dynamic Variables
Variable Code
Variable
Direction
Physical Interface
0
PV (Primary Variable)
input
Analog current input – Analog Channel 0
1
SV (Secondary Variable)
output
None
2
TV (Tertiary Variable)
output
None
4
QV (Quaternary Variable)
output
None
3.4 Device Variables
3.4.1 Supported Device Variables
The Limitorque HART actuator device supports the following Device Variables:
Table 3.5 – Supported Device Variables
Variable
Code
Variable
Direction
Unit Code
Device Variable
Classification
Device Variable
Family
Range
0
Position setpoint
input
% (57)
Not Classified (0)
Valve/Actuator (6)
0-100
1
Current position
output
% (57)
Not Classified (0)
Not Used (250)
0-100
2
Torque
output
% (57)
Not Classified (0)
Not Used (250)
0-100
3
Motor temperature
output
°C (32), °F (33)
Temperature (64)
Not Used (250)
Not Limited
4
Compartment
temperature
output
°C (32), °F (33)
Temperature (64)
Not Used (250)
Not Limited