interlock program
HELP! plc lab assignment and I am confused??
There are four sensors to an annunciator system which disables the output if certain operational failure. Draft a program tha alarm system works as follows: 1. if an input is not happening 2. Any two inputs are ON, a green pilot light goes on 3. Any fires three inputs, a yellow pilot light comes on 4. Any four inputs to a red pilot light goes ON 5. Interlock the lights, leaving only a pilot light in a time
When I was AB PLC would do the following (assuming the inputs are I: 1 / 0 - I: 1 / 3 and green light = O: 2 / 0, yellow = O: 2 / 1, red = O: 2 / 2) CLR N7 : 0; XIc I: 1 / 0 ADD N7: 0 1 N7: 0; XIc I: 1 / 1 ADD N7: 0 1 N7: 0; XIc I: 1 / 2 ADD N7: 0 1 N7: 0; XIc I: 1 / 3 ADD N7: 0 1 N7: 0; EQU N7: 0 OTE O 2: 2 / 0; EQU N7: 0 3 OTE O: 2 / 1; EQU N7: 0 4 OTE O: 2 / 2;
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