Process Error Messages - Endress+Hauser RMM621 Operating Instructions Manual

Troubleshooting
Shown on display
Config error:
• Pressure
• Analog flow!
• PFM pulse flow!
• Applications!
• Limit values!
• Analog outputs!
• Pulse outputs!
• No pump start as control system blocked!
• No pump start as start condition not met!
Signal range violation "channel name" "signal
name"
Cable open circuit: "channel name" "signal name"
Range violation
Cable open circuit: "channel name" "signal name"
Limit value violation
Limit value violation 'number' rectified (blue)
• "Limit value designation" < "threshold value"
"unit"
• "Limit value designation" > "threshold value"
"unit"
• "Limit value designation" > "gradient" "unit"
• "Limit value designation" < "gradient" "unit"
• "User defined message"
• Pulse width between 0.04 and 1000 ms!
• Pulse width between 100 and 1000 ms!
Number between 1 and 15!
Pulse buffer overflow
You should assign a terminal to the flow signal
(pressure signal/level signal)
Not all the inputs are correctly configured for
application 1. Check the settings
60
9.3

Process error messages

Cause
• Faulty or incomplete programming or loss of
calibration data
• Contradictory assignment of terminals
• Error in calculation!
• There is no calculation due to incorrect
configuration
The status of an assigned digital input (e.g. manual
control) results in the deactivation of the pump
control system or the pump control system is not
enabled as the start condition is not met
Current output signal below 3.6 mA or above 21
mA.
Input current at current input smaller than 3.6 mA
(with setting 4 to 20 mA) or larger than 21 mA.
• Incorrect wiring
• Sensor not set to 4-20 mA range.
• Sensor malfunction
• Incorrectly configured end value for flow
transmitter
3.6 mA < x < 3.8 mA (with setting 4 to 20 mA) or
20.5 mA < x < 21 mA
• Incorrect wiring
• Sensor not set to 4-20 mA range.
• Sensor malfunction
• Incorrectly configured end value for flow
transmitter
Resistance too high at PT100 input, e.g. due to
short-circuit or cable breakage
• Incorrect wiring
• PT100 sensor defective
Limit value overshot or undershot
(→ Limit value setting, Section 6.3.3)
Active/passive pulse output: set pulse width not
within valid range.
Number of support points incorrect.
Too many pulses accumulated so the pulse counter
overflows: pulses lost.
In the configuration of the input signal
No/not enough switch points/limit values
assigned
Remedy
• Check whether all the necessary items are
defined with plausible values.
(→ Section 6.3.3 Main menu - Setup)
• Check whether inputs have been assigned in a
contradictory manner.
(→ Section 6.3.3 Main menu - Setup)
Correct the digital input or meet the condition
that results in the pump control system starting,
e.g. a limit value is overshot
• Check whether the current output is scaled
correctly.
• Change the start and/or end value of the scaling
• Check sensor configuration.
• Check function of the sensor.
• Check end value of the connected flowmeter.
• Check wiring.
• Check sensor configuration.
• Check function of the sensor.
• Check measuring range/scaling of the
connected flowmeter.
• Check wiring.
• Check wiring.
• Check function of the PT100 sensor.
• Confirm alarm if the "Limit value/message text/
display and acknowledge" function is configured
(→ Limit value setting, Section 6.3.3).
• Check the application where necessary
• Adjust the limit value where necessary
Change the pulse width to the value range
indicated.
Value correction to a value from this value range.
Increase pulse factor
Limit values and switch points must be assigned to
the pump control system