Calibration of load resistances
To ensure that any load resistances (particularly those associated with coils) can
be monitored without any problems, the connected line must be calibrated during
commissioning. During calibration, the load resistance and the line resistance are
measured and stored as reference values.
The calibration process is initiated by pressing the push button on the
input/output module. Once calibration has been successfully completed,
the input/output module adopts the operating mode. This is indicated by the
input/output LEDs. The LEDs also indicate if the calibration process has failed.
With identical-polarity inverse control, the calibration process can only be
performed if the relays have dropped out. Therefore, control must be activated
following configuration so that the relay will drop out.
Control
Control is possible with or without confirmation. The various configuration options
are described in the next two sections.
See also
Calibrating the control line [ 56]
Control without confirmation [ 39]
Control with confirmation [ 40]
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