Modbus TCP communication between SENTRON PAC3200 and MVI69E-MBTCP

vladkac

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Jun 2014
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Hello everyone,

I have a problem with communication between SENTRON PAC3200 (7KM2111-1BA00-3AA0) and MVI69E-MBTCP.
I would like to retrieve data from power monitoring device but this device (as well as other siemens devices) uses 64 bit floating point number format while Prosofts Modbus TCP/IP Enhanced Communication Module uses 32 bit floating point numbers.

In fact data exchange is working thanks to Prosofts configurator and AOP but data are stored in "INT" format in my tags.

So basically I am loooking for some sort of convert function or something in order to be able to process data further.

My project is coming to the deadline so I am looking for quick way how to solve this problem.

I hope there is somebody who has an experience with Prosoft, Rockwell and Modbus TCP.

Thank you in advance.
Usefull links:
http://www.prosoft-technology.com/Products/Rockwell-Automation-In-chassis/Platform/CompactLogix/Modbus-TCP-IP-Enhanced-Communication-Module
 
Last edited:
If he's talking about energy counter registers than yes they are 64bits, but they are not float they are integer.
If plc doesn't support 64bit tags than it is possible to split them into two 32bit tags and display them in HMI in two separate output fields, just position them to look like one single number.
 
I know that the energy registers are integer type, but I had the S7-1200 to work with which does not support 64bit integer but it supports Lreal which you can use to put the integer part of the register.
I think the reason that the registers are 64bit is because the energy units is in wh and varh instead of kWh and kVarh.
If you use the profibus module on the pac3200 it has 32bit registers for the energy.
I am not sure about your proposal about splitting the register into to parts. I am not sure I understand.
 

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