Omega FC-21 - Manual (Page 71)

67
FC-21 Flow Computer
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.
The setup expects modem
usage and a modem is not
responding.
Unit was operated with an
input power level lower than
safe operating range for an
extended period of time.
13.3 Error & Warning Messages:
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 to
SUPERtrol
• Replace modem
• Check setup for
proper baud rate,
parity, etc.
• Check modem
connection and
cycle power to
SUPERtrol
• Replace modem
• Check data in unit.
Totalizer may have
inaccuracies
• Investigate
brownout cause.
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
13.3.1
Sensor/Process Alarms