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Hi all:
This is a similar question to the recent SLC 5/03 DH485 / NET AIC question.
I currently have a system with the following components: SLC 5/03, DH485, PanelView900C (DH485 option), and a couple of AIC's. I would like to
upgrade the system to allow me to connect to the PLC via the Internet (security is another issue). I plan to also add a 'proper' HMI to the
system as well, although I have not decided upon which brand yet. Ideally I would like to be able to connect to the system on a remote PC and run the HMI as if I was 'just another node on the control network.' This would include using a web viewer on the remote machine to view the HMI pages (do not need an extra HMI license then). Ideally this would even allow the ability to upload/download the PLC and Panelview program to the remote computer.
I currently use a dial-up connection via modems to remotely 're-program' the PLC etc. This works OK but the long distance charges can add up pretty
fast. I also currently just get a data dump of all the PLC data files and manipulate/display them offline using Excel. The system was setup to have the PLC log all of the 'data' into its local memory. This includes the alarm logs as well. Seems pretty archaic but it actually works very well (just max's out the PLC memory...). I plan to move all of the data logging and alarm logging to a proper HMI in the future.
Should I change the control net to another type?
Should I install an Ethernet highway and use the SLC 5/05?
What OS should I plan to use for the HMI?
The 'palm pilot' type of roaming HMI gizmo is also a possible option but that would be way down the road.
Cost is obviously a factor since we have a shoe-string budget here.
Any suggestions would be greatly appreciated.
Bill.
This is a similar question to the recent SLC 5/03 DH485 / NET AIC question.
I currently have a system with the following components: SLC 5/03, DH485, PanelView900C (DH485 option), and a couple of AIC's. I would like to
upgrade the system to allow me to connect to the PLC via the Internet (security is another issue). I plan to also add a 'proper' HMI to the
system as well, although I have not decided upon which brand yet. Ideally I would like to be able to connect to the system on a remote PC and run the HMI as if I was 'just another node on the control network.' This would include using a web viewer on the remote machine to view the HMI pages (do not need an extra HMI license then). Ideally this would even allow the ability to upload/download the PLC and Panelview program to the remote computer.
I currently use a dial-up connection via modems to remotely 're-program' the PLC etc. This works OK but the long distance charges can add up pretty
fast. I also currently just get a data dump of all the PLC data files and manipulate/display them offline using Excel. The system was setup to have the PLC log all of the 'data' into its local memory. This includes the alarm logs as well. Seems pretty archaic but it actually works very well (just max's out the PLC memory...). I plan to move all of the data logging and alarm logging to a proper HMI in the future.
Should I change the control net to another type?
Should I install an Ethernet highway and use the SLC 5/05?
What OS should I plan to use for the HMI?
The 'palm pilot' type of roaming HMI gizmo is also a possible option but that would be way down the road.
Cost is obviously a factor since we have a shoe-string budget here.
Any suggestions would be greatly appreciated.
Bill.