YOKOGAWA YTA610, User Manual

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<4. Diagnostics >
4-2
IM 01C50T01-02EN
• Procedure to call up the display
Device setup → Process variables → Dynamic
Variable → PV
→ PDQ: PV data quality
→ LS: PV limit status
Device setup → Process variables → Device
Variables → Sensor1
→ Sns1 PDQ: Sensor1 data quality
→ Sns1 LS: Sensor1 limit status
Above procedure is the same about other
variables.
Table 4.1 List of Alarms
Indicator HART display Cause
Output operation during
alarm
Action
AL.00 CPU Fail Main CPU failed. According to the Burnout in
Hardware failure output
Communication disabled
Replace the amplifier.
AL.01 Sensor NV Fail Sensor non-volatile memory
verifies alarm.
According to the Burnout in
Hardware failure output
Communication enabled
AL.02 Temp NV Fail Non-volatile memory of
TEMP ASSY verifies alarm.
AL.03 AD Conv Fail Input circuit hardware failed.
AL.04
*2
Main Rvrs Calc Fail MAIN ASSY memory failed.
AL.05 Temp Rvrs Calc Fail TEMP ASSY memory failed.
AL.06 Temp Voltage Fail TEMP ASSY voltage failed.
AL.07 Comm NV Fail Communication non-volatile
memory verifies alarm.
AL.08 Temp NV Warning Non-volatile memory of the
TEMP ASSY verifies alarm.
Continue to operate and
output
AL.09 Int Comm Fail Internal communication
failed.
According to the Sensor
Burnout output
Communication enabled
AL.10 Sensor1 Failure Sensor 1 failed or
disconnected from terminal
block.
Refer Table 4.2. • Check sensor for
damage.
• Check terminal
connection.
AL.11 Sensor2 Failure Sensor 2 failed or
disconnected from terminal
block.
AL.12
*1
Sensor1 Short Sensor 1 short-circuited.
AL.13 *1 Sensor2 Short Sensor 2 short-circuited.
AL.14 *1 Sensor1 Corrosion Sensor 1 corroded. Continue to operate and
output
Check sensor,
terminal, and cable.
AL.15
*1
Sensor2 Corrosion Sensor 2 corroded.
AL.20 Sensor1 Signal Error Sensor 1 input is out of
measurable range.
• Check sensor
connection.
• Check sensor type
selected.
AL.21 Sensor2 Signal Error Sensor 2 input is out of
measurable range.
AL.22
*3
Terminal Sensor Fail Terminal block temperature is
abnormal. Or terminal block
temperature sensor failed.
Refer Table 4.2 Replace the amplifier.
AL.23 Backup Sensor1 Fail During sensor backup
operation, Sensor1 fails, it
has output Sensor2.
Operating to the backup side.
When the backup side also
fails, output is according to
burnout setting.
Check sensor1 for
damage.
AL.24 Backup Sensor2 Fail During sensor backup
operation, Sensor2 fails.
Continue to operate and
output
Check sensor2 for
damage.