DaleAlanB
Member
I have an AutomationDirect DL06 PLC (PLC A) that is presently a master on a multi-node RS485/422 network (network 1) using the on-board port 2. I am trying to attach this PLC to a second network (network 2) as a slave using port 2 of a D0-DCM module. Network 2 will not always be active which is why I'd like PLC A to be a slave on network 2.
The problem I am having is when I attempt to start network 2, the red error light on the D0-DCM module flashes along with the green TX/RX lights. And no data appears to transfer between PLC A and PLC B (master) on network 2.
If I rework my programs so the PLC A is the master on both networks, the error light goes out, and communication on network 2 is successful. So I know I have the D0-DCM configured correctly.
What am I doing wrong? Why can't I make PLC A a slave on network 2? It seems to me that I should be able to do this as long as I use a different port for each network.
I'm using DirectNet protocol on both networks. All PLCs are DL06. Each PLC has been assigned unique station numbers, and both ports on PLC A have unique numbers (I've also tried assigning the same number to both ports - port 2 on the on-board and the D0-DCM module - with same results). Both networks are serial. Network 2 will only have two PLCs on it - PLC A and PLC B)
Any help would be appreciated.
Thanks.
The problem I am having is when I attempt to start network 2, the red error light on the D0-DCM module flashes along with the green TX/RX lights. And no data appears to transfer between PLC A and PLC B (master) on network 2.
If I rework my programs so the PLC A is the master on both networks, the error light goes out, and communication on network 2 is successful. So I know I have the D0-DCM configured correctly.
What am I doing wrong? Why can't I make PLC A a slave on network 2? It seems to me that I should be able to do this as long as I use a different port for each network.
I'm using DirectNet protocol on both networks. All PLCs are DL06. Each PLC has been assigned unique station numbers, and both ports on PLC A have unique numbers (I've also tried assigning the same number to both ports - port 2 on the on-board and the D0-DCM module - with same results). Both networks are serial. Network 2 will only have two PLCs on it - PLC A and PLC B)
Any help would be appreciated.
Thanks.