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I need help of the unity pro that using XXMIT function block diagram. Any one have idea that using XXMIT? Cause when i using XXMIT then it not request my devices that is power meter.

I want to connect my PLC (Quantum) to communicate with my power meter. I am using RS232 to RS485 converter. My cable pin is just using 2,3 n 5 only. This is my 1st time of using quantum PLC.

Any way schneider people not support me. i dunt want say where i from. Hope any one out there can help me for using UNITY PRO.Thankx in advanced.

Hi,

I am sure your local Schneider will support you, if you purchased the s/w, and h/w from them. That is, they market Unity s/w, and Quantum CPUs in your country.

The XXMIT function is used to turn the Modbus port on the Quantum into a Modbus master. Your power meter will be a Modbus slave. Obviously you need to assign an address to the power meter. You also need to know its parity, baud rate, data bits, stop bits. Without the XXMIT configured correctly, the Modbus port(s) will only act as Modbus slaves, i.e. they will not be able to communicate to your power meter.

In Unity I would right click into your programming window and select FBSD input assistance. Then go into library, then go in communications, select XXMIT. Then place the XXMIT block into the program. Double clicking into the block or hovering the mouse over the input, or output pins will tell you what format the data has to be. That is a Byte, Integer, Bool, Ebool, etc.

Right click on to the block and select help on type, you will be provided with more information regarding how to configure the block. Part of the XXMIT block is to define the communications parameters, stop bits, data bits, parity, port you are communicating out of the Quantum, etc.

PLEASE NOTE that Unity s/w is a complex product, and as such you really need to attend a training course on the product. Even this will only give you an introduction, but it's better than nothing.

You also need to know what Modbus function codes the power meter uses, and configure the XXMIT block to suit.


On December 4, 2007, Daniel wrote:
> I need help of the unity pro that using XXMIT function block diagram. Any one have idea that using XXMIT? Cause when i using XXMIT then it not request my devices that is power meter.
>
> I want to connect my PLC (Quantum) to communicate with my power meter. I am using RS232 to RS485 converter. My cable pin is just using 2,3 n 5 only. This is my 1st time of using quantum PLC.
>
> Any way schneider people not support me. i dunt want say where i from. Hope any one out there can help me for using UNITY PRO.Thankx in advanced. <