Chapter 6 PLC Programming 111
The modular Allen-Bradley SLC 503 programmable logic control-
ler will be used to create the PLC ladder logic diagram of the relay
logic diagram displayed in Figure 6-13.
Software allows you to set up the I/O configuration. Figure 6-14
shows processor type 1747-L532 with a four slot chassis being selected.
Slot zero is always reserved for the PLC processor. Slot one houses a
sixteen port 120 VAC input module (see Figure 6-15). Slot two houses
a sixteen port 120 VAC output module (see Figure 6-16).
Figure 6-14. Select processor type 1747-L532 with four expansion slots.
Figure 6-15. Select the 1747-I*16 input module with sixteen 120 VAC
input ports.