3.1: Introduction to our PLC we use(Moeller).

The plc is used is the Ps4-201a klochner moeler micro plc . the plc has a basic unit (containing the processor) and can have several expansion units that expand the number of I/Os . expansion units are categorized as:

Local Expansion Units: Non-programmable and are directly linked to the processor via flat cable.

Remote Expansion Units: programmable units including other plcs connected via network connection.

• Hardware and software requirement Sucosoft S 40

To program the PS4-201 you need a PC With at least a Pentium processor

a Windows 95, Windows 98 or Windows NT 4.01)operating system

at least 16 Mbyte RAM ,3.5″disk drive/1.44 MByte and CD-ROM drive

Hard disk with at least 40 MByte free capacity; the temporary directory C:\ {_S40_}.TMP is created during the installation and deleted again.

This requires at least 250 Kbytes free space on drive C:

Serial ports (COM 1 to COM 4)

Parallel printer port (LPT1)

VGA graphics card

Programming cable ZB4-303-KB1 (connecting cable between PC and PS4-201)

• Features The main features of the PS4-201 PLC are as follows:

24 V DC power supply

8 digital inputs, 2 4V DC

6 digital outputs, 24 V DC

2 analog inputs

1 analog output