Interface Function Codes - Keithley 6514 Instruction Manual

Interface function codes

The interface function codes, which are part of the IEEE-488 standards, define an instru-
ment's ability to support various interface functions and should not be confused with pro-
gramming commands found elsewhere in this manual. The interface function codes for the
Model 6514 are listed in Table F-6.
Table F-6
Model 6514 interface function codes
Code
SH1
AH1
T5
L4
SR1
RL1
PP0
DC1
DT1
C0
E1
TE0
LE0
The codes define Model 6514 capabilities as follows:
SH (Source Handshake Function) — SH1 defines the ability of the instrument to initiate
the transfer of message/data over the data bus.
AH (Acceptor Handshake Function) — AH1 defines the ability of the instrument to guar-
antee proper reception of message/data transmitted over the data bus.
T (Talker Function) — The ability of the instrument to send data over the bus to other
devices is provided by the T function. Instrument talker capabilities (T5) exist only after the
instrument has been addressed to talk.
L (Listener Function) — The ability for the instrument to receive device-dependent data
over the bus from other devices is provided by the L function. Listener capabilities (L4) of the
instrument exist only after it has been addressed to listen.
SR (Service Request Function) — SR1 defines the ability of the instrument to request ser-
vice from the controller.
RL (Remote-Local Function) — RL1 defines the ability of the instrument to be placed in
the remote or local modes.
Interface function
Source Handshake capability
Acceptor Handshake capability
Talker (basic talker, talk-only, serial poll, unaddressed to talk on LAG)
Listener (basic listener, unaddressed to listen on TAG)
Service Request capability
Remote/Local capability
No Parallel Poll capability
Device Clear capability
Device Trigger capability
No Controller capability
Open collector bus drivers
No Extended Talker capability
No Extended Listener capability
IEEE-488 Bus Overview F-13