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How can I tell if a connection is busy?

How can I tell if a connection is busy?

‎08-10-2005 11:25 AM

I have a program that connects to a PLC via modbus through an ethernet connection.  I am trying to read multiple coils(bits) and I get an Error 57, Network Connection is Busy.  Is there a way to prevent this error, such as checking if the network is busy before trying to read.
Ron Deavers, CLD
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