Endress+Hauser Proservo NMS5 Operating Instruction page 93

Proservo NMS5
Diagnostic : LOCAL ERROR DEV1(2)
Local Error Device 1 or 2
HART connection OK?
Yes
HART terminal voltage
is 16V or less?
Yes
HART sensor breakage or
HART circuit or power
malfunction
Repair is required.
Diagnostic : LOCAL Error NMT
Local Error: NMT
Check NMT error.
Refer to NMT operation
manual.
HART terminal voltage
is 16V or less?
HART sensor breakage or
HART circuit or power
malfunction
Repair is required.
Diagnostic : LOCAL Error NMT
Maintenance
YYMMDDhhmm TT ##
Endress+Hauser
Meaning:
HART communication error
arose in HART sensor 1 or 2.
Sensor is disconnected
when GVH549 and 649
No
= ON.
Perform GVH549 and 649
= 0.
Set the communication
No
address as follows.
GVH591 = 4
GVH691 = 5
Meaning:
An error has occurred at the
NMT temperature sensor.
When sensor is
No
disconnected GVH362
status is not OFF.
This shows NMS status
is on maintenance
at GVH157.
11 Diagnosis and troubleshooting
Diagnostic : LOCAL ERROR NRF
Local Error: NRF
Check G3V6H1:
NRF > = v 1.82, CONTACT2
NRF < v 1.82, CONTACT1
No
G3V6H1 correct ?
Yes
HART is within Yes
DC16.5 to 25.5V?
No
Check HART bus wiring,
NMS HART module, TCB
NRF HART module, and
FCB
Diagnostic : MPU : RESET
MEM. ERROR
YYMMDDhhmm TT ##
Yes
Frequent ?
No
CPU might be influenced
by noise.
Check how it functions.
Meaning:
An error arose in NRF tank
side monitor.
Correct the data of
GVH361.
Check NMS HART module,
TCB, NRF HART module,
and FCB.
Meaning:
CPU went out of control by
external noise and watch
dog functioned to restart
the program.
Check that the gauge has
been correctly grounded.
Check the cause of external
noise and take
countermeasures.
Replace CPU TCB and check
how it functions.
93