Max Machinery 121 INDICATOR - Manual (Page 65)

13.2 Diagnosis Flow Chart and Troubleshooting
13.3.1
Sensor/Process Alarms
121-000-350 © 2001 Max Machinery, Inc. Pg 65
Error/Warning Message
TOTALIZER ROLLOVER
AUX INPUT TOO LOW
RTD OUT OF RANGE
RATE OVERFLOW ERROR
PULSE OUT OVERFLOW
FLOW RATE ALARM LOW
FLOW RATE ALARM HIGH
TEMP ALARM LOW
TEMP ALARM HIGH
DENSITY ALARM LOW
DENSITY ALARM HIGH
BATCH OVERRUN ALARM
MODEM NOT PRESENT
SOFTWARE ERROR
RESET
EXTENDED PFI LOCKUP
Cause
Displayed when totalizer
rolls over
4-20 mA Input current at
aux input smaller than 3.5
mA:
• Faulty Wiring
• Transmitter not set to "4-
20 mA"
• Transmitter defective
Input current at RTD input
too low:
• Faulty wiring
• RTD defective
Pulse counter overflowed.
The totalizer may have lost
counts.
Calculated pulse frequency
too large:
• Pulse width setting too
long
• Larger pulse scaler needed
Limit value exceeded.
Batch size exceeded by
more than set limit.
The setup expects modem
usage and a modem is not
responding.
Abnormal program termina-
tion may have occurred as a
result of power transient.
Unit was operated with an
input power level lower than
safe operating range for an
extended period of time.
Remedy
Acknowledge
Rollover,
Remedy not required
• Check wiring
• Check function of sensor
• Check wiring
• Check function of RTD
sensor
• Report error to factory
• Check application conditions
• Check wiring
• Adjust pulse value
• Adjust pulse width
• Check process conditions
• Check application if necessary
• Check limit value
• Adjust the limit value if
required
• Check valves in system for
proper operation and/or leaks
• Check limit value
• Adjust the limit value if required
• Check setup for proper
baud rate, parity, etc.
• Check modem connection
and cycle power
• Replace modem
• Clear error
• Verify instrument setup
• Cycle power
• Additional filtering may be
required on power input
• Check data in unit.
Totalizer may have inaccu-
racies
• Investigate brownout cause.