Hi,
I have a redundant CPU ControLogix with single 13 slot i/o rack and PanelView on controlnet. Redundant supplies, etc. but pretty much works out of the box.
Problem: I need dual Modbus RTU comms out of this system. Customer wants 'redundant' Modbus to his DCS.
My original attempt was Prosoft MVI Modbus cards, one in each CPU rack. A-B tech support says don't do it. Prosoft says it's ok, depending on who there you ask. Being a redundant system, this makes me a bit nervous to try! Does anyone have any comments on this configuration?
Next thought is put Prosoft cards in I/O rack. Appears this is no good as I get a ControlNet memory size error when configuring the rack. Something to do with memory usage of all the cards in the I/O rack + the Prosoft card exceeds the CNB node requirments for the rack.
I suppose my final solution is to loose the Prosoft cards and use a DIN rail Modbus gateway with EthernetIP or the like. A bit messy and expensive as I already have the Prosoft cards.
Any comments are appreciated!
Thanks
I have a redundant CPU ControLogix with single 13 slot i/o rack and PanelView on controlnet. Redundant supplies, etc. but pretty much works out of the box.
Problem: I need dual Modbus RTU comms out of this system. Customer wants 'redundant' Modbus to his DCS.
My original attempt was Prosoft MVI Modbus cards, one in each CPU rack. A-B tech support says don't do it. Prosoft says it's ok, depending on who there you ask. Being a redundant system, this makes me a bit nervous to try! Does anyone have any comments on this configuration?
Next thought is put Prosoft cards in I/O rack. Appears this is no good as I get a ControlNet memory size error when configuring the rack. Something to do with memory usage of all the cards in the I/O rack + the Prosoft card exceeds the CNB node requirments for the rack.
I suppose my final solution is to loose the Prosoft cards and use a DIN rail Modbus gateway with EthernetIP or the like. A bit messy and expensive as I already have the Prosoft cards.
Any comments are appreciated!
Thanks