Working With A Running Spc - Woodward 8200-225 Product Manual

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Manual 26236 SPC Servo Position Controller

Working with a Running SPC

Monitoring the SPC with the Input/Output Lines
The SPC has several I/0 functions available for control and monitoring. These are:
Analog (4 to 20) mA Position Demand Input
The scaling for the analog position demand is user-configurable, that is, the 0 % and 100 % positions
need not correspond exactly to 4 mA and 20 mA.
Position Monitor Output
The position monitor output gives an indication of the actuator position measured by the SPC. This output
has fixed scaling such that 0 % position gives 4.0 mA and 100 % position gives 20.0 mA.
Shutdown Input
The SPC shuts down whenever the shutdown input terminals are open. For normal operation, the
shutdown input terminals must be shorted.
Alarm/Shutdown Reset Input
The Alarm/Shutdown reset input provides a way to reset alarms and shutdowns using a contact closure.
The reset function is triggered by an open-to-closed transition on the reset input terminals.
Shutdown Status Output
The shutdown status output indicates when the SPC shuts down for any reason. A relay connected to this
output can be made to de-energize whenever the SPC is shut down.
Alarm Status Output
The alarm status output indicates whether any SPC alarm conditions are present. A relay connected to
this output can be made to de-energize whenever an alarm is active.
Making Adjustments with the SPC Service Tool
The SPC Service Tool window has several tabbed pages that allow adjustments to be made to the SPC.
The Overview page includes a check box labeled Calibration will be performed through DeviceNet or
CANopen. When this box is checked, calibration can only be performed through Digital Interface. When
this box is unchecked, calibration can only be performed using the service tool.
The Dynamics page includes various parameters depending on the controller type that has been
configured.
The Alarm Setup page allows you to change alarm and shutdown settings. See Changing Alarm and
Shutdown Settings for more information.
Making adjustments will often change the configuration of the SPC, and you may want to save this
configuration to a file. After you are finished making changes, read the SPC's configuration in to a
Configuration Editor window. Then save the configuration to a file. Finally, to have the configuration
identifier in the SPC updated with the file name and date, load the configuration back into the SPC. See
Configuring the SPC for detailed instructions.
When editing numeric parameters, you must press Enter on the keyboard or select another item for
changes to take place.
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