[Daily Question 20090302] What are the communication protocols of DCS and list the products?

The communication protocol of DCS is: PROFIBUS, MODBUS, CANOPEN, etc. There are also different system manufacturers' own communication protocols. The communication interface has: The communication protocol of RS232 and RS485 CS3000 is: The communication interface of MODBUS CS3000 is: RS485 This post was last edited by Meihua Piaoxiang on 2009-3-2 16:04 ]

The communication protocol of DCS is: PROFIBUS, MODBUS, CDT, DLT645, IEC60870-5-101, 102, 103, 104, etc. Many third-party equipment manufacturers will also define their own proprietary protocols. For example, many belt scales, flue gas collection and the like have special protocols. The communication interface has: RS232, RS485, Ethernet and some manufacturers use GPRS, but very few.

Siemens PCS7 DCS system: CPU to HMI station, S7 On EtherNet. From CPU to IO station, it is Profibus DP. The CPU to the smart meter is the DP/PA gateway. For system communication with DCS from other manufacturers, usually Modbus, CP341 needs to be added to the ET200M station.

The connection between ABB AC800M system CPU and CPU is MMS protocol, Ethernet. The connection between CPU and HMI is OPC format (MMS encapsulated into OPC) and Ethernet. Between the CPU and the IO station, you can use ModuleBus or Profibus DP. CPU to smart instrument, supports DP/PA, and also supports FF-HSE. The CPU connects to many third-party devices through Modbus, and the CI853 module needs to be added to the CPU. ABB AC800F system CPU has a dedicated protocol with the CPU. The specific name is not mentioned, Ethernet. Between the CPU and the HMI is a dedicated protocol, Ethernet. Between the CPU and the IO station, CAN or Profibus DP can be used. CPU to smart instrument, supports DP/PA, and also supports FF-HSE. The CPU communicates with many third-party devices via Modbus protocol, and the FI820F module needs to be added to the CPU.

The EtherNet/IP protocol is used between the Honeywell E-PKS C200 system CPU and the CPU, which conforms to the CIP message format. . . (AB's protocol) The Ethernet/IP protocol is used between the CPU and the HMI server, but it is encapsulated by RSLinx. Convert to standard interface. There are 2 types of buses available between the CPU and the IO station. The IO station adopts HW's own PM series IO station, uses IO Link module, and uses a dedicated IO Link bus. The IO station adopts AB's IO and uses the ControlNet module. Take AB's ControlNet bus. If Modbus communication is used between the CPU and other manufacturers, it will be more troublesome, because the Modbus communication card is made by a third party, not AB.

CS3000 communication protocol is: MODBUS? ? ?