What is @CPU 928b?

CPU 928B Programming Guide 3 – 74C79000-B8576-C898-01 Application example for semaphores Tasks: Four CPUs are plugged into an S5-135U. They output status messages to a status signalling device via a common memory area of the O peripherals (OW 6).

What are IPC flags in CPU 928b?

CPU 928B Programming Guide 10 – 4C79000-B8576-C898-01 10.1.3 Exchanging Data via IPC Flags Interprocessor communication (IPC) flags are available for cyclic exchange of binary data. They are used mainly for transmi tting information byte by byte.

How to address the I/O peripherals of a 928b CPU?

CPU 928B Programming Guide 3 – 24C79000-B8576-C898-01 Addressing I/Os You can use load and transfer operations to address the I/O peripherals as follows: •directly using the following operations: L../T.. .. PY, ..PW, ..OY, ..OW or •using the process image with the following operations: L../T.. ..

What is the use of Db X + 1 in 928b?

CPU 928B Programming Guide 6 – 118C79000-B8576-C898-01 Note If DB x + 1 is not kept free during the initialization, it will be used as a controller data field without any warning if its length is identical to that of a controller DB (49 data words); data words 20 through 48 are cleared. Otherwise the CPU goes to the stop mode.