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Output DIR

If you want to display a list of all the programmed blocks on the PG

with the CPU 948, OB 0 is displayed instead of the system program

blocks.

The function is permitted in the operating modes RUN, SOFT STOP,

HARD STOP and can also be called within the "program test"

function.

Output address

With the "output address" function, you can display the contents of

memory and I/O addresses in hexadecimal format. You can access all

addresses (RAM, S5 bus, areas with no modules assigned). In the

process image area no ADF is triggered, in the I/O area there is no

QVZ.

In the areas addressed as bytes (flags, process image) the high byte is

represented as ’FF’.

11.2.2

Installation

Overall reset

With the function "delete all blocks" you can carry out an overall reset

of the CPU from the PG. The overall reset is carried out

unconditionally (refer to Section 4.2).

Compress memory

This function shifts all valid blocks in the user memory to the

beginning of the user memory. Unused areas that resulted from

deleting or correcting blocks are eliminated. This function shifts

complete blocks to the beginning of the memory area. Ideally, one

large free area results from many small unused areas. You can load

blocks into the resulting large space.

You can call this function in the RUN and soft STOP modes. In the

RUN mode, DBs and DXs that are longer than 512 data words are not

shifted. In the STOP mode, all blocks are shifted.

The blocks are shifted via a buffer so that no data is lost if there is a

power failure. If this buffer is insufficient for intermediate storage of a

block, compressing continues at the next unused memory area.

Consequently, some unused areas can still remain after compressing.

Siemens CPU 948 User Manual

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