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Create and Configure IO Server (DSC Module)

Creates a new Modbus, ModbusSlave, or OPC I/O server and adds the I/O server to the Shared Variable Engine.

You also can use this Express VI to configure or replace an existing I/O server.

Dialog Box Options
Block Diagram Inputs
Block Diagram Outputs

Dialog Box Options

ParameterDescription
I/O Server TypeSpecifies the type of I/O server you want to configure or create.
Set AttributesDisplays the Configure Modbus Instance, Configure Modbus Slave Instance, or Configure OPC Client Instance dialog box, depending on the I/O Server Type that you specify.
Common ParametersSpecifies general information about the process and the I/O server you want to configure or create.
  • Process name—Specifies the name of the process to which this VI belongs.
  • I/O server name—Specifies the name of the I/O server you want to configure or create.
  • Overwrite the original I/O server—Specifies whether to replace an existing I/O server with the I/O server you want to create if the two I/O servers have the same name.
TipsSpecifies tips for configuring or creating the I/O server.

Block Diagram Inputs

ParameterDescription
Process nameSpecifies the name of the process to which this VI belongs.
I/O server nameSpecifies the name of the I/O server you want to configure or create.
OverwriteSpecifies whether to replace an existing I/O server with the I/O server you want to create if the two I/O servers have the same name.
AddressSpecifies the address of this instance of the I/O server. This option appears if you select Modbus or ModbusSlave from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.
Baud RateSpecifies the baud rate of this instance of the I/O server. You can select a value from 2400 to 115200. This option appears if you select Modbus Serial from the Model pull-down menu of the Configure Modbus Instance or Configure Modbus Slave Instance dialog box.
error in (no error)Describes error conditions that occur before this VI or function runs.
Refresh RateSpecifies how often this instance of the I/O server refreshes the device, in seconds. This option appears if you select Modbus from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.
Serial PortSpecifies the serial port this instance of the I/O server uses to communicate with the device. You can select a serial port in the range from COM1 to COM32. This option appears if you select Modbus Serial from the Model pull-down menu of the Configure Modbus Instance or Configure Modbus Slave Instance dialog box.
IP AddressSpecifies the IP address of the device with which the Modbus I/O server communicates. This option appears if you select Modbus Ethernet from the Model pull-down menu of the Configure Modbus Instance dialog box.
DeadBandSets the percent change within a range that a value from the OPC server must change before the OPC server communicates the value to the Shared Variable Engine. This option appears if you select OPC from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.
MachineSpecifies the name of the computer from which you can select an OPC server. This option appears if you select OPC from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.
Prog IDSpecifies the ID of the OPC server. This option appears if you select OPC from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.
Reconnect Poll RateSpecifies how often, in seconds, the Shared Variable Engine attempts to connect to an OPC server after losing the connection to the server. Enter a value of 0 if you do not want the Shared Variable Engine to retry the connection.

This option appears if you select OPC from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.

Update RateDetermines the amount of time that passes before the OPC server communicates updated values to the Shared Variable Engine. This value is a requested update rate for the OPC server. The actual update rate returned by the OPC server is greater than or equal to this value. Entering a value of 0 returns the fastest update rate possible from the OPC server.

This option appears if you select OPC from the I/O Server Type pull-down menu on the configuration dialog box of this Express VI.

Block Diagram Outputs

ParameterDescription
I/O server url outReturns the relative URL to the computer if the I/O server configuration is successful. Otherwise, I/O server url out returns an empty string. Wire I/O server url out to the I/O server url input of the Delete IO Server VI to remove the I/O server programmatically.
error outDescribes the error status that this VI or function produces.

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