Can I write to Modbus I/O Server addresses without creating bound variables?

Hi all,
I'm wondering if it's possible to use the Modbus I/O Server without explicitly creating bound variables?
If I write a value to the bound variable at "ni.var.psp://My Computer/Slave/300001", the master can see the value.
The variable properties paeg says that the variable is bound to "My Computer\Slave.lvlib\ModbusSlave1\300001"
I deleted the bound variable and tried a few different ways to write directly to the I/O Server, but all of them gave me Error 0x8BBB0005. I tried the following:
ni.var.psp://My Computer/Slave/300001
ni.var.psp://My Computer/Slave/ModbusSlave1/300001
ni.var.psp://My Computer/Slave.lvlib/ModbusSlave1/300001
ni.var.psp://My Computer/Slave.lvlib/ModbusSlave1/300001
I also tried replacing "My Computer" with "localhost" above. No luck.
Is there anything I've missed? I'm asking because CPU usage is very high, and I thought I might be able to reduce that a bit by removing the 300 bound variables in the system.
Solved!
Go to Solution.

You can use DataSocket with a path like psp:\\localhost\Slave\ModbusSlave1.400001 for read and write access.
Check out the example VI "Monitor OPC Items with DataSocket.vi" in the LabVIEW examples.

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