Siemens CPU 948 - Page 266

ACCU 4
ACCU 2
ACCU 3
ACCU 1
31 0 31 0
<ACCU 4>
<ACCU 2>
<ACCU 3>
<ACCU 1>
<ACCU 4>
<ACCU 2>
<ACCU 3>
<ACCU 1>
OB 132
before after
Shift Accu contents
Fig. 6-1 Effect of the "roll-up" function
ACCU 4
ACCU 2
ACCU 3
ACCU 1
31 0 31 0
<ACCU 2>
<ACCU 4>
<ACCU 1>
<ACCU 3>
<ACCU 4>
<ACCU 2>
<ACCU 3>
<ACCU 1>
OB 133
before after
Shift Accu contents
Fig. 6-2 Effect of the "roll-down" function
OB 132/133: Roll-Up ACCU/Roll-Down ACCU
CPU 948 Programming Guide
6 - 28 C79000-G8576-C848-04