3-14
BHK-1/2-MG 030916
3.3
REMOTE MODE PROGRAMMING USING SCPI COMMANDS VIA IEEE 488 (GPIB). BUS
BHK-MG Power Supplies may be programmed over a control bus using SCPI (Standard Com-
mands for Programmable Instruments). SCPI provides a common language conforming to IEEE
488.2 for instruments used in an automatic test system. The control bus used must be either the
IEEE 488 standard communication bus (General Purpose Interface Bus, GPIB). or the RS 232
Serial Bus described in PAR. 3.5. Refer to Table 2-1 for input/output signal allocations.) Most
power supply functions available from the keypad can be programmed via remote commands, in
addition to some that are not available from the keypad (e.g. triggering, and local lockout).
This section includes a discussion of GPIB bus protocols (PAR. 3.3.1), instructions for changing
the GPIB address (PAR. 3.3.3), a discussion of the VISA (Virtual Instrumentation Software
Architecture) driver supplied with the unit (PAR. 3.4), followed by a detailed explanation of SCPI
programming (PAR. 3.7)
3.3.1
IEEE 488 (GPIB) BUS PROTOCOL
Table 3-6 defines the interface capabilities of the BHK-MG 40W Power Supply (Talker/Listener)
relative to the IEEE 488 (GPIB) bus (reference document
ANSI/IEEE Std 488: IEEE Standard Digi-
tal Interface for Programmable Instrumentation
) communicating with a Host Computer—Controller
(Talker/Listener). Tables 3-7 and 3-8 define the messages sent to the BHK-MG, or received by
the BHK-MG, via the IEEE 488 bus in IEEE 488 command mode and IEEE 488 data mode,
respectively. These messages are enabled during the “handshake” cycle, with the BHK-MG
40W Power Supply operating as either a Talker or a Listener.
TABLE 3-6. 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 BHK-MG executes front panel commands, but can be set to
remote mode via IEEE 488 bus. When in Remote mode all front panel keys
are disabled except LOCAL. LOCAL key can be disabled using keypad
lockout command (see Appendix B, PAR. B.82) so that only the controller
or a power on condition can restore Local mode.
Parallel Poll
PP0
No Capability
Device Clear
DC1
Complete Capability. BHK-MG accepts DCL (Device Clear) and SDC
(Selected Device Clear).
Device Trigger
DT1
Respond to *TRG and <GET> trigger functions.
Controller
C0
No Capability
Содержание BHK-MG Series
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Страница 18: ...xii BHK MG030916 FIGURE 1 1 BHK MG 40W SERIES PROGRAMMABLE POWER SUPPLY...
Страница 24: ...1 6 BHK 1 2 MG OPR 030916 FIGURE 1 2 BHK 40W SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 1 OF 2...
Страница 25: ...BHK 1 2 MG OPR 030916 1 7 FIGURE 1 2 BHK 40W SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 2 OF 2...
Страница 26: ...1 8 BHK 1 2 MG OPR 030916 FIGURE 1 3 RA 24 RACK ADAPTER WITH TWO 1 2 RACK BHK MG 40W UNITS...
Страница 35: ...BHK 1 2 MG SERIES 030916 2 3 FIGURE 2 2 BHK MG SERIES REAR PANEL CONTROLS AND CONNECTIONS...
Страница 100: ...3 54 BHK 1 2 MG 030916 FIGURE 3 20 SERIES AUTOMATIC CONFIGURATION...
Страница 108: ...3 62 BHK 1 2 MG 030916 FIGURE 3 23 PARALLEL AUTOMATIC CONFIGURATION Eo is the output voltage of the power assembly...
Страница 113: ...BHK 1 2 MG 030916 3 67 FIGURE 3 25 PARALLEL MASTER SLAVE CURRENT MODE CONFIGURATION...
Страница 150: ......
