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3026 Programmer Manual
Table C-2: GPIB interface messages (Cont.)
Interface message
Take Control (TCT)
Parallel Poll Configure (PPC)
H Device Clear (DCL). Clears (initializes) all devices on the bus that have a
device clear function, whether the controller has addressed them or not.
H Local Lockout (LLO). Disables the return to local function.
H Serial Poll Enable (SPE). Puts all devices on the bus, that have a service
request function, into the serial poll enabled state. In this state, each device
sends the controller its status byte, instead of the its normal output, after the
device receives its talk address on the data lines. This function may be used
to determine which device sent a service request.
H Serial Poll Disable (SPD). Changes all devices on the bus from the serial
poll state to the normal operating state.
H Go To Local (GTL). Causes the listen-addressed device to switch from
remote to local (front-panel) control.
H Select Device Clear (SDC). Clears or initializes all listen-addressed devices.
H Group Execute Trigger (GET). Triggers all applicable devices and causes
them to initiate their programmed actions.
H Take Control (TCT). Allows controller in charge to pass control of the bus to
another controller on the bus.
H Parallel Poll Configure (PPC). Causes the listen-addressed device to respond
to the secondary commands Parallel Poll Enable (PPE) and Parallel Poll
Disable (PPD), which are placed on the bus following the PPC command.
PPE enables a device with parallel poll capability to respond on a particular
data line. PPD disables the device from responding to the parallel poll.
Appendix C: Interface Specification
Implemented
No
No
C-3
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