Technical data

Interfaces The following operations and parameters are available as interfaces
when programming the use of special functions:
Block call
•• Conditional/unconditional block call JC ... / JU ...
Parameters
•• Parameters for selecting presets using ACCU 1 and possibly
ACCU 2 and/or memory registers.
In this description, the term
parameters refers to all data that the
CPU needs to carry out the special functions correctly. Before you
call these special functions in your STEP 5 program, you must
load this data into the accumulators or into the memory registers
as indicated.
ACCU abbreviations The abbreviations used in reference to the parameter assignment of
special function OBs are as follows:
ACCU 1: ACCU 1, 32 bits
ACCU-1-L:
ACCU 1, low word, 16 bits
ACCU-1-LL:
ACCU 1, low word, low byte, 8 bits
ACCU-1-LH:
ACCU 1, low word, high byte, 8 bits
High word Low word
High byte Low byte High byte Low byte
31 24 23 16 15 8 7 0
Introduction
CPU 928B Programming Guide
6 - 8 C79000-B8576-C898-01