Johnny T
Member
Right.. imagine the scenario.. an old PC running a SCADA system connected to seven S5 PLC's. The system needs upgrading but you have no documentation and no software to open the SCADA project (again, an old SCADA system thats been in for years).
How do you go about upgrading the system to a shiny new Mitsi SCADA front end and S7 PLC's in place of the S5's.
I can upgrade the S5 PLC's without any problems but I have no idea how you can upgrade the SCADA system. I'm very new to SCADA and imagine it works just like an HMI in that you set up an interface area and various 'tags' and then address those tags in the software.
How do I work out what 'tags' are being used when I can't get at the SCADA stuff that's on the system.
Basically what I'm saying, is that most, if not all the people on these forums are far more experienced than me.. so I was wondering how you would go about this.
What I was originally thinking was that if I could upgrade the SCADA system first (and get it to talk to the S5's) and then I could upgrade each PLC in turn.
If I upgrade the PLC's first then the existing SCADA system won't be able to communicate with them.
However, if I upgrade the SCADA system first then how do I go about ascertaining which 'tag' does what..? Or even what info I've got coming back?
Sorry if its a badly worded question and I'll happily expand on it if needed.
Thanks for your advice..
JT
How do you go about upgrading the system to a shiny new Mitsi SCADA front end and S7 PLC's in place of the S5's.
I can upgrade the S5 PLC's without any problems but I have no idea how you can upgrade the SCADA system. I'm very new to SCADA and imagine it works just like an HMI in that you set up an interface area and various 'tags' and then address those tags in the software.
How do I work out what 'tags' are being used when I can't get at the SCADA stuff that's on the system.
Basically what I'm saying, is that most, if not all the people on these forums are far more experienced than me.. so I was wondering how you would go about this.
What I was originally thinking was that if I could upgrade the SCADA system first (and get it to talk to the S5's) and then I could upgrade each PLC in turn.
If I upgrade the PLC's first then the existing SCADA system won't be able to communicate with them.
However, if I upgrade the SCADA system first then how do I go about ascertaining which 'tag' does what..? Or even what info I've got coming back?
Sorry if its a badly worded question and I'll happily expand on it if needed.
Thanks for your advice..
JT