C. Marshall
Member
We have a DH+ network of PLC5s, SLC500s, and a Logix5555. Want to use the Logix as a master time source. Also need to use a day increment counter wherein Monday is day 1, Tues. day 2, etc. and roll over again to 1 following Sunday (day7). The clock and day increment are used in each location for production shift tallies and we need them all to be on the same day and time... thus, the synchronized system clocks.
We have been allowing each PLC/SLC to manage their own clock/date. This is tedious maintenance, so we came up with a way to message the integers from the Logix5555 GSV instruction (and subsequent arithmetic) to the PLCs in the network so that they all are updated at least once per day. This has proven to not be dependable. Over time, one or more of the PLCs ends up with the wrong day increment. The time S:37-42 sync works very well.
Anyone have a suggestion on how to make this accurate? Your ideas are appreciated. I can provide more info if so needed.
We have been allowing each PLC/SLC to manage their own clock/date. This is tedious maintenance, so we came up with a way to message the integers from the Logix5555 GSV instruction (and subsequent arithmetic) to the PLCs in the network so that they all are updated at least once per day. This has proven to not be dependable. Over time, one or more of the PLCs ends up with the wrong day increment. The time S:37-42 sync works very well.
Anyone have a suggestion on how to make this accurate? Your ideas are appreciated. I can provide more info if so needed.