Technical data

6.8 OB 123: Enable/Disable "Delay of Individual Time-Driven Interrupts"

Using special function organization block OB 123, you can prevent

the insertion of certain time-driven OBs (time-driven interrupts with a

fixed time interval) at one or more consecutive block or operation

boundaries.

Function

OB 123 affects the reaction to time-driven interrupts as follows:

Disabling delay of individual time-driven interrupts means all

interrupts will continue to be registered and already pending interrupts

will remain registered. However, registered interrupts will not yet be

processed. All operation or block boundaries will be temporarily

disabled for the processing interrupts. If a time interrupt OB (for

processing a time interrupt with a fixed time base) has already been

started, it is processed to the end.

Disabling delay of individual time-driven interrupts means that with

immediate effect, all cyclic time-driven interrupts will again be

registered, inserted at the next block or operation boundary

(depending on the setting in DX 0) and processed.

Note

If a specific time-driven interrupt OB is called for the second time

during the "Delay interrupt" phase, a collision of time interrupts

occurs.

Parameters

1. Control word

OB 123 records the interrupts to be disabled in a system-internal

control word.

Bit no.: 15 3 2 1 0

Control word

OB 123: Enable/Disable "Delay of Individual Time-Driven Interrupts"

CPU 928B Programming Guide

C79000-B8576-C898-01

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