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In Vijeo Citect while communicating with a device using Modbus protocol I got the message "Can not find serial" and "Driver Modbus not initialized". What is the reason for this message.

This message generally occurs when you have connected the modbus device using some virtual ports and during the the Vijeo Citect runtime startup if this port is not available then Citect gives this message "Can not find serial" and "Driver modbus not initialized". To remove this message you need to put "-nts" in special options field in ports configuration of the device as shown in the snapshot. This special option allows the COMX driver to not terminate at startup if an error occurs. It will also let the driver keep retrying to init the driver until the Port is available.
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