Technical data

Example of ERAB

Other bit condition codes

•• RLO Result of logic operation

This is the result of bit logic operations. It is the truth statement for

comparison operations (refer to operations list, binary logic

operations or comparison operations).

•• STA Status

For bit operations, this indicates the logical status of the bit just

scanned or set. The status is updated in binary logic operations -

except for A(, O(,), O and for set/reset operations.

•• OR Or

Internal CPU bit for handling "AND before OR" logic operations.

Word condition codes

•• OV Overflow

This indicates whether the permissible number range was exceeded

during the arithmetic operation just completed.

•• OS Stored overflow

It can be used in several arithmetic operations to indicate whether an

overflow occurred at any point during the operations.

:S Q 7.7 Last operation of the pre-

vious logic operation

sequence

:A I 1.0

ERAB is set to ’1’,

: the new RLO is formed by

: an AND operation

:O I 6.3 The RLO is influenced by

: an OR operation

:AN I 2.1 The RLO is influenced by

: an AND NOT operation.

:S Q 2.4

ERAB is set to ’0’,

: the sequence is now complete

:JC FB 150 The function block is called

: dependent on the RLO.

STEP 5 Operations with Examples

CPU 928B Programming Guide

C79000-B8576-C898-01

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