KEPCO BIT 4882F - Manual (Page 29)

BIT 4882 030507
4-1
SECTION 4 - OPERATION
4.1 GENERAL
The Kepco BOP Power Supply, with an installed BIT 4882, BIT 4882-F or BIT 4886 Interface
Card, may be programmed over the IEEE 488 standard communication bus (General Purpose
Interface Bus, GPIB) using either SCPI (Standard Commands for Programmable Instruments)
or CIIL (Control Interface Intermediate Language) commands. SCPI and CIIL provide a com-
mon language used in an automatic test system. (Refer to Table 2-3 for input/output signal allo-
cations.)
4.2 IEEE 488 (GPIB) BUS PROTOCOL
Table 4-1 defines the interface capabilities of the Interface Card (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 4-2 and 4-3 define the messages sent to the Interface Card, or received by the Interface
Card, via the IEEE 488 bus in IEEE 488 command mode and IEEE 488 data mode, respec-
tively. These messages are enabled during the “handshake” cycle, with the Interface Card oper-
ating as either a Talker or a Listener.
TABLE 4-1. IEEE 488 (GPIB) BUS INTERFACE FUNCTIONS
FUNCTION
SUBSET
SYMBOL
COMMENTS
Source Handshake SH1 Complete Capability (Interface can receive multiline messages)
Acceptor Handshake AH1 Complete Capability (Interface can receive multiline messages)
Talker T6
Basic talker, serial poll, unaddress if MLA (My Listen Address) (one-byte
address)
Listener L4 Basic listener, unaddress if MTA (My Talk Address) (one-byte address).
Service Request SR1
Complete Capability. The interface sets the SRQ line true if there is an
enabled service request condition.
Remote/Local RL2 No Local lock-out.
Parallel Poll PP0 No Capability
Device Clear DC1
Complete Capability. Controller sends DCL (Device Clear) and SDC
(Selected Device Clear) to selected power supply.
Device Trigger DT1 Complete Capability
Controller C0 No Capability