IOtech Digital488 - Interface Clear (IFC); Serial Poll Enable (SPE); Serial Poll Disable (SPD); Unlisten (UNL)

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Section 2 Getting Started

2.12

2.4.5 Interface Clear

(IFC)

IFC places the

Digital488

in the Talker/Listener Idle State and pulses

the

Clear

output line for approximately 50 microseconds.

2.4.6 Serial Poll Enable

(SPE)

When Serial Poll Enabled, the

Digital488

sets itself to respond to a

serial poll with its serial poll status byte if addressed to talk. When the serial

poll byte is accepted by the controller, any pending

SRQ

s are cleared. The

Digital488

will continue to try to output its serial poll response until it is

serial poll disabled by the controller.

2.4.7 Serial Poll Disable

(SPD)

Disables the

Digital488

from responding to serial polls by the

controller.

2.4.8 Unlisten

(UNL)

UNL places the

Digital488

in the Listener Idle State.

2.4.9 Untalk

(UNT)

UNT places the

Digital488

in the Talker Idle State.