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8 MAINTENANCE
8.1 CONTROLLER ISSUES
Wiring errors and improper programming represent most of the problems presented when using the controller. A final review can avoid wasted time
and losses.
The device has an alarm function, called
Input Error , which is used to report specific errors at the input. In the INPUT ERROR TYPES section you
will find a table with a description of the problems and the messages shown in the device display.
Other error messages displayed by the controller indicate internal damage that signals the need to send the equipment in for maintenance. When
contacting the manufacturer, enter the serial number, which you can find by accessing the Calibration Cycle (
CFG
>>
CALIB
) and then the
parameters Serial Number High (
SnH
) and Serial Number Low (
SnL
).
8.2 INPUT CALIBRATION
The input types leave the factory calibrated. Recalibration is not recommended for inexperienced operators. If it is necessary to recalibrate an input,
proceed as follows:
•
In the Sensor Type (
TYPE
) parameter, present in the Configuration (
Cfg
) >> Input (
IN
) cycle, set the type of input to be calibrated.
•
In parameters
IN.LL
and
IN.HL
of the Input Cycle (
CFG
>>
IN
), use the and keys to program the lower and upper display limits for
the limits of the selected input type (Parameters shown only for linear inputs).
•
Apply to the input terminals a signal corresponding to an indication value slightly above the lower limit.
•
In the
in.LC
parameter of the Calibration Cycle (
CFG
>>
CALIB
>>
in.LC
), use the and keys to make the display indicate the expected
value for the applied signal. Next, press the key.
• Apply a signal that corresponds to a value slightly lower than the upper display limit.
•
In the
in.HC
parameter of the Calibration Cycle (
CFG
>>
CALIB
>>
in.HC
), use the and keys to make the display indicate the expected
value for the applied signal.
•
Check the quality of the calibration. If it is not adequate, repeat the procedure.
Note: When checking the controller, make sure that the Pt100 excitation current required by the calibrator used is compatible with the Pt100 excitation
current used in the device: 0.170 mA.