Hi Gents,
I'd appreciate some ideas on how to slow down some comms between a ControlLogix L63 system and three Micrologix 1400 PLC's. As part of an upgrade project I did replace and upgrade a PLC5 with a Clogix L61 bridge reusing the local PLC I/O and a remote rack I/O . The old system used to be connecetd through RIO to some old SLC's via DCM cards. I removed / replaced the fixed I/O SLC plc's with MLogix 1400 and redone the comms via etherenet. So whatever was interfaced between the old PLC5 system and the three Fixed I/O SLC's via RIO now it's interfaced via Ethernet using message blocks betwen the L63 CPU and the three new MLogix systems,
The system works ok and no issues however the messaging is "fired" from the Clogix to the Mlogix (SLC TYPED READ & WRITE) based on the message block tag .EN bit. This creates some traffic and in the task monitor of the Logix CPU the comms sometimes goes into the red zone 100%. This is not surprising.
My question would be if anyone could give me an idea on how to slow down and interlock these three messages. As in make sure only one is executed at any given time etc.
So onCe again. I have three Micrologix 1400 PLC's . In one of the Contrologix Tasks I have a Program File where I have two messages for each Micrologix 1400. One is a SLC TYPED READ and the Other SLC TYPED WRITE. Typically the Clogix reads from the Mlogix and on some triggers writes some info Back to the MLogix. This happens on the XIO XXXX.EN of the message block bit so it happens as fast as possible and whenever possible.I could obviously put timers in and limit that speed ,etc but I am not sure if this is the best approach.
I am just wondering if anyone had some similar setup and how you solved this.
Any idea hint greatly appreciated.
Thanks.
I'd appreciate some ideas on how to slow down some comms between a ControlLogix L63 system and three Micrologix 1400 PLC's. As part of an upgrade project I did replace and upgrade a PLC5 with a Clogix L61 bridge reusing the local PLC I/O and a remote rack I/O . The old system used to be connecetd through RIO to some old SLC's via DCM cards. I removed / replaced the fixed I/O SLC plc's with MLogix 1400 and redone the comms via etherenet. So whatever was interfaced between the old PLC5 system and the three Fixed I/O SLC's via RIO now it's interfaced via Ethernet using message blocks betwen the L63 CPU and the three new MLogix systems,
The system works ok and no issues however the messaging is "fired" from the Clogix to the Mlogix (SLC TYPED READ & WRITE) based on the message block tag .EN bit. This creates some traffic and in the task monitor of the Logix CPU the comms sometimes goes into the red zone 100%. This is not surprising.
My question would be if anyone could give me an idea on how to slow down and interlock these three messages. As in make sure only one is executed at any given time etc.
So onCe again. I have three Micrologix 1400 PLC's . In one of the Contrologix Tasks I have a Program File where I have two messages for each Micrologix 1400. One is a SLC TYPED READ and the Other SLC TYPED WRITE. Typically the Clogix reads from the Mlogix and on some triggers writes some info Back to the MLogix. This happens on the XIO XXXX.EN of the message block bit so it happens as fast as possible and whenever possible.I could obviously put timers in and limit that speed ,etc but I am not sure if this is the best approach.
I am just wondering if anyone had some similar setup and how you solved this.
Any idea hint greatly appreciated.
Thanks.