file: C:\hagen\wpfiles\vertexdoc\siemenssys.wp6 8-17-00

Documentation for Siemens Crates and Modules

Note: Siemens uses the term "Programmable Controller" for the entire Simatic S5 crate. Our crate contains two computers: the programmable logic controller CPU 928B ("PLC"), and the 80385 computer CP581 which is known as the Local Control Unit ("LCU"). The PLC directly controls the pointing hardware while the LCU handles peripheral tasks and communications. We also have an expansion crate that houses various Siemens digital and analog I/O cards.

I. Siemens Simatic S5-135U Crate

The crate has 21 slots, a power supply, fans, and a back-up battery compartment.

II. Simenens CPU 928B (PLC)

III. Siemens CPU 581 (LCU)

This single-board computer is fitted with a mass storage module (silicon disk) and two AT-slot modules (one for the IRIG time code reader and one for the 3Com Ethernet card). The LCU contains the dual-port RAM used to pass data to and from the PLC.

IV. Siemens CP524/COM 525 (Serial Interface for the PCU - Portable Control Box)

V. Siemens WF705 Position Measuring Module (interface for 4 shaft encoders)