Accu 3 and 4

In the PLCs of the S7-400 series there are accu 3 and accu 4 which are also 4 bytes big that are used for saving intermediate results at complex calculations.

Operations with these accus :

ENT

LEAVE

PUSH

POP

See also:

CPU

Accumulator 1

Accumulator 2

S7-400 is a registered trademark of Siemens AG