Connect more than one HMI to a single PLC ??
- Thread starter mosama
- Start date
gtsuport
Member
Simple answer is yes.
More details would be needed for a complete answer.
More details would be needed for a complete answer.
Tom Jenkins
Lifetime Supporting Member
This isn't uncommon. To do this there are several options. You can have more than one comm port on the PLC, either on hte CPU or using a separate add-on communications card. You can use an RS-485 communications link and a peer to peer comm protocol (A master slave protocol like Modbuse RTU won't work.) Or you can use ethernet, which is inherrently peer to peer.
muusic_man
Member
We do this with AB PLC's and standard desktop computers running Wonderware. Everything is connected via MOXA ethernet switches. I think ethernet is faster and more reliable that 485. And yes, more details would be necessary.
BryanG
Member
The other way is to read the bit in the Mitsubishi manual entitled 'Connection of Two Operator Panels in Transparent Mode'. Or chapter 18 Network communication if you prefer ethernet. But that's just me being picky.... RTFM
Bryan
Bryan
gtsuport
Member
What model plc are you using?
What model number hmi are you using?
How are you planning to connect the hmi's to the plc?
(serial, ethernet, etc.)
This will be a good start.
The Omron NTlink protocol should allow you to use multiple HMI's. If you are using Hostlink, try the pass through feature in the HMI it is exists in the model you are using.
If none of the above, use a port splitter (multiplexer). There are several companies which can offer these.
If none of the above, use a port splitter (multiplexer). There are several companies which can offer these.
Thank you I'll try this
Does any one have answer for this question?
InstantHMI from Software Horizons can run on multiple touch screens or PCs simultaneously, while connecting to the Omron PLC. Any changes made on any device will be updates across the network. www.instanthmi.com
Thanks every one
My Beijer Electronics HMI supports Ethernet network between several HMI panels, but I want to use a computer as a controller.
I decided to use MODBUS TCP/IP (or EIA/TIA-232-E, EIA-422, EIA/TIA-485-A) protocol for communication between the HMI and my computer, but what is the cable used for this communication? and its wiring if possible?
My Beijer Electronics HMI supports Ethernet network between several HMI panels, but I want to use a computer as a controller.
I decided to use MODBUS TCP/IP (or EIA/TIA-232-E, EIA-422, EIA/TIA-485-A) protocol for communication between the HMI and my computer, but what is the cable used for this communication? and its wiring if possible?
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