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4-11GFK-0804B Chapter 4 The Micro PLC Instruction Set
Coils
The Micro PLC instruction set includes the following coils:
–( )– Coil. The basic type of program output.
–(SET)– Set coil. Used to set a specified reference to 1.
–(RST)– Reset coil. Used to reset the same specified reference to 0.
–(MCR)– Master Control Relay. Used to set a group of outputs to 0.
–(SKIP)– Skip. Used to cause a group of outputs to hold last state.
–(END)– End of MCR or Skip
Using Coil Pairs
The following types of coils must always be used in pairs. If one of these instructions is
used in the program, the paired instruction must also exist somewhere in the program.
SET RST Set and Reset
MCR END Master Control Relay and End MCR
SKIP END Skip (rungs) to rung containing End
General Programming Software Instructions for Coils
1. Select –( )– (F3), then use the assigned function key(s) to select an output type:
–( )– (F1) Coil
–(SET)– (F2) Set coil
–(RST)– (F3) Reset coil
–(MCR)– (F4) Master Control Relay
–(SKIP)– (F5) Skip
–(END)– (F6) End of MCR or Skip
The selected coil type appears at the end of the rung:
2. Enter an appropriate address. For a coil, enter an address in output (O) or internal
coil (C) memory. For example, C0001. You don’t need to enter leading zeros.
3. Press the Enter key. The memory type and address appear:
If you want to change the memory type and address, press the Enter key. A cursor
appears next to the address. Type in the new memory type and address. Press the Enter
key again to accept the new entry.