On-site PLC control, central DCS control
Thread Content
For one of our project installations, the on-site control is handled by the PLC provided by the manufacturer; we are not able to modify certain programs. Meanwhile, the control room uses the Zhejiang University Control System, which is standard across all facilities owned by the factory. The project is still under construction, and the company asked our workshop to create DCS screens. Since we are not specialists in instrumentation, we had to simplify the PID functions and draw them out anyway. I was wondering if it’s possible to directly transfer the screens from the PLC to the DCS How should it be implemented?
This involves communication issues between PLCs and DCS, so it’s recommended that you have someone familiar with control systems handle it – it’s quite complex.
The system of Zhejiang University’s central control unit requires card components and reconfiguration; it’s better to let the central control team handle it for you.
Just draw the DCS interface in the process diagram; leave the rest to the automatic control system. Additionally, Zhejiang University’s Control Systems Group provides technical services.
It’s achievable; it’s best to have discussions and communicate with both parties. It’s not that simple. As for configuration, port interfacing, and so on, perhaps many of these cannot be integrated.
For communication between PLCs and DCS, we use the MODBUS 485 communication protocol interface; Zhejiang University Control Systems should also be compatible with it
That’s great. Our company is currently working on it, but it doesn’t seem to be functioning fully yet
We also use a 485 interface for the connection; is it necessary to create an operation interface on the DCS? After all, since it’s available on the PLC, is it possible to transmit the images from the PLC to the DCS via communication?
The PLC data is only communicated to the DCS for monitoring purposes. It should be possible to implement PLC screen display and operation on DCS.