What do you do if you have an existing system,  different devices running on different protocols...and you've got to implement control, plus hook up via IEC104S to a SCADA...and that is only part of the picture.

Well--if you are Rene Tomingas FIE of Estonia, you use Unitronics All-in-One PLC + HMI programmable controllers , models Vision1040 and V570, to get the job done!
Read about it here:
https://unitronicsplc.com/testemonials-category-carrousel/?category=Power-Energy&tid3170