Festo CPX-4AE-4AA-H, Operating Instructions Manual

Page: 30 / 52

30 Festo — CPX-4AE-4AA-H — 2021-06b
Commissioning
Channel parameter: monitoring of channel 0 … 3
Description Monitoring of the individual channels of the analogue module for the following
errors:
–
lower and upper critical limit
–
wire break (idling)
–
overflow/underflow
–
Parameterisation error for the lower and upper critical limit
The monitoring of the errors can be individually activated or deactivated. Active
monitoring has the following effect:
–
Error message at the CPX bus nodes
–
The error LED lights è 8.3 LED display.
Monitoring of lower and upper critical limit
–
Error message when the lower critical limit is undershot
è
Tab. 20 Descrip-
tion of “Lower critical limit of channel 0 … 3".
–
Error message when the upper critical limit is exceeded è Further informa-
tion.
Monitoring of wire break (idling)
–
Effective for signal range 4 … 20 mA (with and without HART)
–
Range of values for wire break detection at inputs
è
7.5 Data format and
range of values of the actual values.
–
The wire break detection at outputs is effective only if the current value
output amounts to at least 1 mA.
Monitoring of overflow/underflow
Error message when the range of values is left
è
7.5 Data format and range of
values of the actual values.
Monitoring of parameterisation errors
Prerequisites for the monitoring of channel-specific parameterisation:
–
The “Monitoring of parameterisation errors” module parameter is active
è
Further information.
–
The “Monitoring of parameterisation errors” channel parameter is active.