KEPCO KLP Series Developers Guide, Rev 3 - Manual (Page 91)

KLP-DEV 041213
7-1
SECTION 7 - IEEE 488.2 (GPIB) INTERFACE
7.1 DIGITAL REMOTE MODE PROGRAMMING USING IEEE 488.2 (GPIB) INTERFACE
KLP Power Supplies may be programmed over the IEEE 488 standard communication bus
(General Purpose Interface Bus, GPIB) control bus using SCPI (Standard Commands for Pro-
grammable Instruments). SCPI provides a common language conforming to IEEE 488.2 for
instruments used in an automatic test system (see Section 6). Refer to Table 7-1 for GPIB port
input/output signal allocations. All power supply functions available from the front panel can be
programmed via remote commands, as well as some that are not available from the front panel:
Save/Recall (see PAR. 1.2.5), List (see PAR. 1.2.6) and Relay Control (see PARs. B.10 and
B.11).
7.2 IEEE 488 (GPIB) BUS PROTOCOL
Table 7-2 defines the interface capabilities of the KLP power supply (Talker/Listener) relative to
the IEEE 488 (GPIB) bus (reference document ANSI/IEEE Std 488: IEEE Standard Digital Interface
for Programmable Instrumentation) communicating with a Host Computer—Controller (Talker/Lis-
tener). Tables 7-3 and 7-4 define the messages sent to the KLP, or received by the KLP, via the
IEEE 488 bus in IEEE 488 command mode and IEEE 488 data mode, respectively. These mes-
sages are enabled during the “handshake” cycle, with the KLP power supply operating as either
a Talker or a Listener.
TABLE 7-1. IEEE 488 PORT CONNECTOR (J4) PIN ASSIGNMENTS
PIN SIGNAL NAME FUNCTION
1 D I 01 I/O Line
2 D I 02 I/O Line
3 D I 03 I/O Line
4 D I 04 I/O Line
5 EOI End or Identify
6 DAV Data Valid
7 NRFD Not Ready for Data
8 NDAC Not Data Accepted
9 IFC Interface Clear
10 SRQ Service Request
11 ATN Attention
12 SHIELD Shield
13 D I 05 I/O Line
14 D I 06 I/O Line
15 D I 07 I/O Line
16 D I 08 I/O Line
17 REN Remote Enable
18 GND Ground (signal common)
19 GND Ground (signal common)
20 GND Ground (signal common)
21 GND Ground (signal common)
22 GND Ground (signal common)
23 GND Ground (signal common)
24 LOGIC GND Logic Ground