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Table 3-7. operation of #rst command, 9 error message explanations, 6 programming using digital control – KEPCO BOP-GL 1KW Operator Manual Firmware Ver.3.05 and higher User Manual

Page 89: Error message explanations -27, Programming using digital control -27, Operation of #rst command -27, R. 3.6)

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BOP-1K-GL 022814

3-27

control whether the *RST command sets the output on or off. The *RST command can be con-
figured using the SYST:SET command (PAR. B.144).

3.5.9

ERROR MESSAGE EXPLANATIONS

Refer to Table B-5 for an explanation of error messages returned by the SYST:ERR? (PAR.
B.132) query.

3.6

PROGRAMMING USING DIGITAL CONTROL

BOP models may be digitally programmed over a control bus using SCPI (Standard Commands
for Programmable Instruments). SCPI provides a common language conforming to IEEE 488.2
for instruments used in an automatic test system (see PAR. 3.7). The control bus used must be
either the IEEE 488 standard communication bus (General Purpose Interface Bus, GPIB), or the
RS 232C Serial Bus.

Refer to Table 2-12 for input/output signal allocations for communication via the GPIB, Table 2-6
for RS 232, and Table 2-3 for the BITBUS.

This section includes a discussion of GPIB bus protocols (PAR. 3.6.3), instructions for changing
the GPIB address (PAR. 3.6.3.1.1), RS 232C Operation (PAR. 3.6.4), a discussion of the VISA
(Virtual Instrumentation Software Architecture) driver supplied with the unit (PAR. 3.6.5), fol-
lowed by a detailed explanation of SCPI programming (PAR. 3.7).

When either of the two interface ports are in use, PAR’s 3.6.3.1 (GPIB) and 3.6.4.3 (RS 232)
describe how to configure the port to meet the user’s requirements.

The BOP can be conveniently substituted for a standard BOP that is currently being used with
one of Kepco’s BIT cards by using one of the Compatibility Modes provided (see PAR. 3.6.1 and
3.6.2.

The

SYSTem:SET

(PAR. B.144) command can be used to configure the BOP to operate in a

manner consistent with earlier models of Kepco’s 100W, 200W and 400W BOP power supplies.

TABLE 3-7. OPERATION OF #RST COMMAND

Load type when *RST

Issued (see NOTE)

BOP Status After *RST Issued

• Active or Resistive Load

(see PAR. 3.5.5)

• Voltage mode
• Main Channel reference set to 0.0V
• Current protect set to 5% of

I

Onom

• Voltage protect set to 5% above

E

Onom

• Battery Load (see PAR.

3.5.5)

• If *RST set to ON, unit is set to Voltage Mode
• If *RST set to OFF unit is set to Current Mode
• Main Channel reference set to 0.0A
• Current protect set to 5% of

I

Onom

• Voltage protect set to 5% above

E

Onom

NOTE: Prior to issuing *RST unit may be operating in either voltage mode or

current mode.