Installation Instructions Manual

Bul. 937C HART Loop Converter Installation Instructions
In normal operation, the display shows:

the current values of the HART
variables PV, SV, TV, QV in the selected unit

the p
resent current output values for the three current outputs in mA

the c
urrent device status
This display shows information about the device status of the field device (1 byte) and
abou
t the response code (1 byte) of the field device. These two bytes are displayed in
the first line of the display in hexadecimal form with the code RC on the left side.

the cu
rrent setting of the type of communication
•
T
he isolated ba
rrier reestablishes the HART circuit. The isolated barrier
performs the field device query using the HART command 3.
• LOOP
Poll
The isolated barrier performs the field
device query using the HART command 3.
•
The iso
lated barrier receives the HART command 3 of the field device.
• LOOP Mixed
The isolated barrier performs the field
device query using the HART command
3 (polling). The field device is in burst mode, however it references a different
HART command than 3.
In the ev
ent of a fault, the display shows:

Err Device Fault
Displays a device fault in
the isolated barrier – red LED lights up.

Err Communication
Displays a communication fault – r
ed LED flashes.

Err Field Device Malfunction
Displays a field device failure – red LED
f
lashes.
Display Indicators
44
LOOP
Locate
LOOP
Burst