KEPCO MBT Series - Manual (Page 89)

MBTSVC111609
3-51
3.3.1 GENERAL
Kepco MBT Power Supplies (Models MG and MGR, with the “G” option enabled) may be pro-
grammed over a control bus using either SCPI (Standard Commands for Programmable Instru-
ments) or CIIL (Control Interface Intermediate Language) commands. SCPI and CIIL provide a
common language conforming to IEEE488.2 for instruments used in an automatic test system.
The control bus can be either the IEEE 488 standard communication bus (General Purpose
Interface Bus, GPIB), or the RS232C communication bus. (Refer to Table 2-2 for input/output
signal allocations.) Most power supply functions available from the keypad can be programmed
via Remote command.
3.3.2 IEEE 488 (GPIB) BUS PROTOCOL
Table 3-20 defines the interface capabilities of the MBT power supply (Talker/Listener) relative
to the IEEE 488 (GPIB) bus (reference document ANSI/IEEE Std 488: IEEE Standard Digital Inter-
face for Programmable Instrumentation) communicating with a Host Computer—Controller (Talker/
Listener).
Tables 3-21 and 3-22 define the messages sent to the MBT, or received by the MBT, 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 MBT power supply operating is either
a Talker or a Listener.
TABLE 3-20. 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 RL1
Complete capability. Interface selects either local or remote information. In
local mode the MBT executes front panel commands, but can be set to
remote mode via IEEE 488 bus. When in Remote mode (REMOTE status
indicator on) all front panel keys except LOCAL function (SHIFT then
CLEAR ENTRY) are disabled. LOCAL function can be disabled using pro-
grammed local lockout command so that only the controller or a power on
condition can restore Local mode.
Parallel Poll PP0 No Capability
Device Clear DC1
Complete Capability. MBT accepts DCL (Device Clear) and SDC (Selected
Device Clear).
Device Trigger DT0 No Capability
Controller C0 No Capability