Pacific UPC-32, Operation Manual, Page: 89 / 140

SECTION 5 REMOTE OPERATION
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SECTION 5
GPIB and REMOTE OPERATION
5 GPIB and SERIAL REMOTE OPERATION
This section describes remote control functions of the UPC over the IEEE-488 BUS or RS-232 Serial
Remote Interface. It is strongly recommended that the user read Section 4 (Front Panel Operation) to
become familiar with the capabilities of the UPC. Section 5 expects the user to have already gained an
understanding of those capabilities.
Most commands listed in this section are also used with the optional RS-232 Serial Remote Interface.
See section 10 for detailed information on the RS-232 Remote Interface.
5.1 INTRODUCTION
REMOTE CONTROL is established when control or programming commands are sent to the UPC by a
Bus Controller with REN (remote enable) set true. The REN line on the bus interface must be held
TRUE to maintain REMOTE CONTROL. REMOTE CONTROL can only be initiated and maintained
while the UPC is displaying a Metering display or while in the UPC STATUS display, but not while editing
any screen data. All front panel programming and signal controls are disabled while REMOTE
CONTROL is active, but metering information is still accessible for viewing at the front panel display.
Status and metered data queries do not place the UPC into REMOTE CONTROL.
The front panel
LOCAL key allows the user to restore LOCAL CONTROL unless the Bus controller has
sent the IEEE-488 - LOCAL LOCKOUT (LLO) message. The Bus Controller may restore LOCAL
CONTROL by sending the IEEE-488 - GOTO LOCAL (GTL) message.
Refer to para. 4.6.3.3 for setting the GPIB device address.
NOTE: PPSC has Virtual Instrument drivers available for use with National Instruments LabWindows ,
and LabView programming environments. These software drivers simplify custom programming and
control of the UPC via the REMOTE interface. A sample application, UPC Interactive, written in
LabView, including the source code, is also available.