Host Engineering Forum
General Category => Do-more CPUs and Do-more Designer Software => Topic started by: markbyerley on November 10, 2016, 02:23:04 PM
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I need to interface 3 remote CmoreMicros (EA3-T6CL) to One H2-DM1E system talking to 3 EBCs via an ERM100. I am using the onboard Serial port of the H2-DM1E to interface with a local Cmore using the DoMore programming protocol. The Cmore micros both support ethernet (using the EA-ECOM) and RS-485. I also have a H2-ECOM100 and a Serio-4 in the chassis with the H2-DM1E. Does the DoMore Serial or DoMore Ethernet support multiple Cmore's or will one of the other protocols work?
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In order to support multiple masters (i.e. the C-mores), you can use 1 Ethernet port or multiple serial ports. I would recommend using either the built-in Ethernet port of your Do-more or possibly your ECOM100 module, which also understands Do-more protocol.
I would NOT use the H2-SERIO-4 since it only has one 485 port (but two 232 ports), so you would need two 232/485 converters for the other two ports in the SERIO/4.
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I have no idea if C-Mores will do this, but it's common with with many brands for multiple HMI's to have one be the master, and all the others request their data from that one, then it bundles all the data required and gets it all from the PLC in one shot. That makes the PLC comms more efficient, avoids redundant requests, plus avoiding the potential for collisions between requests from HMI's all acting as comm masters.
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I have no idea if C-Mores will do this, but it's common with with many brands for multiple HMI's to have one be the master, and all the others request their data from that one, then it bundles all the data required and gets it all from the PLC in one shot. That makes the PLC comms more efficient, avoids redundant requests, plus avoiding the potential for collisions between requests from HMI's all acting as comm masters.
Yes they can.
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Sure you can use multi C-more Micros on one Do-more. I currently using 2 mixed micros on my Do-more project and planing to install a third one. One of the C-mores is an older mono display with the other a newer color display. I have them connect to the H2-SERIO, not the /4 model. I also using ERM100 connected to multiple EBC also. Then I wrote code for sync the displays for some of the of the display pages and other I left to operate individually.