RELIANCE 57C493 Digital channel module

Calibrating from the SPC Service Tool The SPC Service Tool includes a “wizard”, called the Calibration Assistant, to guide you step-by-step through the calibration procedure. To use the service tool to calibrate, the Calibration will be performed through DeviceNet checkbox in the Overview page of the SPC Service Tool window must be unchecked. To begin calibrating, select Action and then Calibrate SPC... from the menu. The Calibration Assistant window will appear. The SPC must be shut down in order to begin calibration. The calibration procedure will vary depending on whether a proportional or integrating actuator controller has been configured on the Servo Controller page of the Configuration Editor. At each step, click on the Next button to proceed to the next step of the procedure or click on the Cancel button to terminate the calibration process and revert back to the existing calibration, if one existed.

SPC Calibration

 The SPC must be calibrated to the specific position feedback device on an actuator. There are two methods to accomplish this—calibration using the SPC service tool, and calibration through the DeviceNet bus. The SPC service tool guides the user trough the calibration procedure. Calibration through the DeviceNet bus places a burden on the control system application software to perform all the required steps in the proper order. Please consult the control system documentation for information on performing calibration over the DeviceNet bus.

The Calibration Assistant presents the following 5 steps

1. Introduction This opening step explains the purpose and use of the Calibration Assistant. 2. Minimum This step defines the 0 % position point. Alarm and shutdown conditions are checked by the SPC during this step, but a shutdown will not force the actuator current to zero. Use the Null Current Offset to adjust the actuator to the Minimum position. Position value is not valid until calibrated.

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