Applies To:
  • CitectSCADA
  • CitectHMI
Summary:
How do I set up communication between a Ethernet Eurotherm device and CitectSCADA. How does the register mapping work. 

Solution:
Ethernet based Eurotherm device use Modbus over TCP/IP to communicate. So you can set up an I/O Device to use Modnet protocol to communicate to them. It is important to put the value of 1 in the address field of the I/O Device form.

Register mapping scheme works as follows

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Eurotherm Register 41433 is equal to 441434 in CitectSCADA

Explanation

1) Take care of Offset of 1

Add 1 to Eurotherm register address (41433 + 1 = 41434)

Now this 41434 is the physical address in the Eurotherm device.

2) Put 4 in front of the address calculated in Step 1. Therefore 41434 becomes 441434

441434 is the address for CitectSCADA to read value register 41433 in the Eurotherm device.

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Note that there are devices other than Eurotherm that follow the same register mapping scheme.

 
Keywords:
Modnet, Eurotherm, Register Mapping 

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