irondesk40
Member
Have a machine we recieved for evaluation that is from Italy that has a compact logix 1769-L24er plc. It has a high speed counter that has a encoder connected and is using this encoder count to determine when to turn on and operate motors, cylinders etc as product moves through the machine. It the program they are taking the actual counter0currentcount and moving that into another tag MainMotorPosition. What we have found if that for some reason you stop the machine and turn the power off and the encoder has not make a complete revolution and reset its count, the value in the counter0currentcount will go to zero. The machine is designed so that if it is stopped during the cycle you can resume the cycle and finish it and all the cams work as they should, but if power is turned off you loose the counter0currentcount.
The folks that designed the machine are coming it to take care of this as well as some other issues we have found. Based on experience from folks on this site is there a memory retentive area that the counter0currentcount value can be moved into or a way to set that up so that when you turn the power off and on it does not loose the count value.
Thanks
The folks that designed the machine are coming it to take care of this as well as some other issues we have found. Based on experience from folks on this site is there a memory retentive area that the counter0currentcount value can be moved into or a way to set that up so that when you turn the power off and on it does not loose the count value.
Thanks