Siemens S5-135U/155U appendix Loading user programs in all CPUs, Prerequisites

Multiprocessor Operation/Coordinators

Step 6	Loading STEP 5 user programs in all CPUs:
	S Recommended precondition: The programs of the individual CPUs have
	already been tested in single-processor operation.
	For details of loading STEP 5 blocks and using the different types of
	memory, please consult the relevant Programming Guides of the CPUs and
	your PG Manual.

Prerequisites

What?

Data block DB 1 must be present for I/O allocation.

Data block DX 0 must additionally be present at

CPU 948.

The mode for ªProcess interrupts via IB 0 = offº must be set in DX 0.

To start multiprocessor operation immediately with all CPU programs, you must now load your programs into the individual CPUs.

After completing these steps, however, you can load individual programs into certain CPUs.

Where?

in all CPUs 1)

only in

CPU 948

into the desired CPU 1)

1.You must only load the blocks for CPUs with RAM operations; for EPROM operation, the inserted EPROMs must contain your user program with DB 1 (DX 0).

Data blocks which you have provided for dynamic data storage must be copied after a RESET by program into the RAM.

Reaction

There is no change in the reactions of Step 4 (each CPU still emits the output inhibit signal: the BASP LED is continuously lit).

6-10	System Manual
	C79000-G8576-C199-06