Luke007
Member
Good Day Everyone
I need your help, I have a 6 stage compressor for cooling a building. I need to program logic for a Micrologix 1500 to have the compressors start with the lowest hours compressor first, then start second lowest hours next and so on up to six compressors. The compressors turn on each stage by time. For example if one stage turns on when there is a cooling call if the temperature does not return to set point within 20 mins then another stage turns on, then 20 mins later another stage turns on and so on. There is no hour meters, there is just a set of contacts that close when a compressor stage is on and the time is recorded in the PLC using timers and counters. And to challenge you, once set point is reached the compressors will shutdown the same sequence they started up. Then when the next call for cool comes the compressor sequence will start with the lowest hours first again. I have some experience programming PLC;s but I need help starting off. Thank you.
Luke
I need your help, I have a 6 stage compressor for cooling a building. I need to program logic for a Micrologix 1500 to have the compressors start with the lowest hours compressor first, then start second lowest hours next and so on up to six compressors. The compressors turn on each stage by time. For example if one stage turns on when there is a cooling call if the temperature does not return to set point within 20 mins then another stage turns on, then 20 mins later another stage turns on and so on. There is no hour meters, there is just a set of contacts that close when a compressor stage is on and the time is recorded in the PLC using timers and counters. And to challenge you, once set point is reached the compressors will shutdown the same sequence they started up. Then when the next call for cool comes the compressor sequence will start with the lowest hours first again. I have some experience programming PLC;s but I need help starting off. Thank you.
Luke