Siemens CPU 948 User Manual

Bit number Meaning
5
6
7
8
Queue overflow in timed interrupt period 6 (OB 15 has been called again before the
prior call was completely executed).
Queue overflow in timed interrupt period 7 (OB 16 has been called again before the
prior call was completely executed).
Queue overflow in timed interrupt period 8 (OB 17 has been called again before the
prior call was completely executed).
Queue overflow in timed interrupt period 9 (OB 18 has been called again before the
prior call was completely executed).
9 Timed interrupt clock pulse masked for too long.
After processing OB 33, the program is resumed at the interrupted
timed interrupt OB.
Note
If "interruptability at block boundaries" is set, following a collision
of timed interrupts, the SAC does not point to the block at whose
boundary the collision of timed interrupts took place (BE
statement) but rather to the block which called the block that
caused the error (the return address). You can set the following
parameters in data block DX 0 (refer to Chapter 7) for
time-controlled program execution:
- setting the basic clock rate
- setting the clock distributor,
- setting priorities relative to interrupt-driven program execution,
- enabling/disabling timed interrupt processing.
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CPU 948 Programming Guide
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Siemens CPU 948 Specifications

General

Brand	Siemens
Model	CPU 948
Category	Controller
Language	English