Siemens S5-135U/155U appendix 923C Coordinator Module Technical Description

Multiprocessor Operation/Coordinators

6.5923C Coordinator Module

6.5.1Technical Description

This section contains information on the application, design and principle of operation of the 923C coordinator.

Application	The 923C coordinator module can be used in the S5-135U/155U
	programmable controller and in the EU S5-185U expansion unit. There are
	three main task areas which are, to some extent, independent:
	S Bus arbitration (only in the central controller)
	To coordinate multiprocessor operation, i.e. the simultaneous use of two
	to four CPUs (CPU 948, CPU 928B, CPU 928, CPU 922).
	S Communication memory (only in the central controller)
	For the interchange of data between CPUs via communication flags and
	data blocks.
	S Central programmer connection (PG MUX)
	For the programming and startup of up to 8 modules via one PG
	connection.
	To program a programmable controller via the SINEC H1 or SINEC
	L1/L2 bus, connect the SINEC CP to the PG connection of the COR C
	using the 725 cable (ªswingº cable).

6-18	System Manual
	C79000-G8576-C199-06