How to cummunicate to a customers PLC

[userxyz]

Our customer wants support in a way that I can connect to their PLC.

How can this be done, modem, vpn ?

 

[nettogrisen]

yes

 

[curlyandshemp]

Our customer wants support in a way that I can connect to their PLC.

How can this be done, modem, vpn ?

Easiest way if the PLCs are ethernet based is to create a dial-up networking connection, using either a SCADA PC with a modem or an ethernet modem such as N-TRON 102RAS.

If security is an issue, the customer can always control the connection of the phone line to the modem.

I had one customer years ago , who had a two position switch in his office, one position connected the phone line to the SCADA PC modem, the other position to the company's retail store's Debit Machine dial up line.

 

[Longhorn]

Yeah a remote modem, VNC Viewer running on the SCADA client which runs e.g. simatic manager, this will allow remote control of that station but tends to be a bit slow but would do the job!