Hi all,
I have an application where the plant PLC is communicating via Ethernet/IP to 3 different field PLC's. The Field PLC's are all Micrologix 1100.
On every scan of the plant PLC it will write a 1 into N11:0/9. That bit is a run permissive to the field PLC's. We recently had a issue where the communications when down. With no communications the last value was held in the file and the unit kept running.
They want me to reset the bit every 10 seconds so that if the communications goes down again the machine wont just keep running. I only want to reset that bit and not the whole word. There are other bits in that word that can cause shut down if set to 0.
To do this would I have done a Masked Move with a blank word as the source, a mask of 0000000001000000 or 40H or 64 Dec. Is this the best was to do this? Is there better ways of doing this.
I didn't write the original code. I am just tasked with making it work. Changing the plant PLC code is possible but I would prefer to make all the changes in the field PLC's. Less political BS that way.
Let me know your thoughts.
I have an application where the plant PLC is communicating via Ethernet/IP to 3 different field PLC's. The Field PLC's are all Micrologix 1100.
On every scan of the plant PLC it will write a 1 into N11:0/9. That bit is a run permissive to the field PLC's. We recently had a issue where the communications when down. With no communications the last value was held in the file and the unit kept running.
They want me to reset the bit every 10 seconds so that if the communications goes down again the machine wont just keep running. I only want to reset that bit and not the whole word. There are other bits in that word that can cause shut down if set to 0.
To do this would I have done a Masked Move with a blank word as the source, a mask of 0000000001000000 or 40H or 64 Dec. Is this the best was to do this? Is there better ways of doing this.
I didn't write the original code. I am just tasked with making it work. Changing the plant PLC code is possible but I would prefer to make all the changes in the field PLC's. Less political BS that way.
Let me know your thoughts.