CHAPTER 5
APPLICATIONS
Entire Contents Copyright 2004 by Adaptive Power Systems, Inc. (APSI) • All Rights Reserved • No reproduction without written authorization from APSI.
APS-3000P Series 5 - 2 OM-001-03000-00P-03.9
PLC External Interface
All APS Power Converters have a built-in PLC External Interface. Consequently, all
APS Power Converters can be operated remotely. The PLC external interface is
particularly useful for tests that require the use of independent metering and external
data acquisition instrumentation. The PLC external interface allows remotely located
contact closures to start / stop one of three test programs. These test programs are
located in memory sets P1, P2, and P3.
Operation of the PLC remote interface does not require a true PLC, as simple switch
closures are effective at starting and stopping a stored test program. However, although
simple switches can be used, they require manual operation. The use of a PLC permits
external automatic control of the test programs in memories P1, P2, or P3.
The APS PLC internal circuitry is activated by first setting the system parameter PLC
to ON. In addition, you must connect an external switch / controller. The controller is
attached using the PLC External Interface D-Sub DE-9 connector located on the rear
panel of your APS-3000P Power Converter (see page 3-8).
NOTE: The PLC D-Sub DE-9 connector is NOT an RS-232 or GPIB data connector.
When the PLC system parameter is set to ON in the Systems parameters, the TEST
button on the front panel is disabled. If the TEST button is pressed, PLC ON will be
displayed on the panel, an alarm will sound, and the system will return to its previous
status. If the system encounters an error, the front panel RESET button or the ON/OFF
control at the PLC remote can be enabled to perform a system reset.
A sketch of the APS PLC DE-9 pinouts and simple switch configuration is shown on
the following page.
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