Write and Read Multiple Holding Registers VI

Modbus slave in specifies the reference to the Modbus slave instance. Use the Create Slave Instance VI to create a Modbus slave instance.

write operation starting address specifies the initial address for the write operation. Valid values are between 0 and 65,535, where 65,535 is the maximum number.

The address that this VI writes is 0-based, meaning that the address numbering convention for the Modbus slave starts at 0.

values to write specifies the holding register values you want to write. values to write is an array. Valid sizes of this array are between 1 and 65,536, where 65,536 is the maximum number. After you specify a value for values to write, check the value you specify for write operation starting address. Ensure that you do not make this VI write the value of a holding register whose address is larger than 65,535.

Otherwise, LabVIEW returns error code -389113.

error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

read operation starting address specifies the initial address for the read operation. Valid values are between 0 and 65,535, where 65,535 is the maximum number.

The address that this VI reads is 0-based, meaning that the address numbering convention for the Modbus slave starts at 0.

read count specifies the number of holding registers to read. Valid values are between 1 and 65,536, where 65,536 is the maximum number. After you specify a value for read count, check the value you specify for read operation starting address. Ensure that you do not use this VI to read the value of a holding register whose address is larger than 65,535.

Otherwise, LabVIEW returns error code -389113.

Modbus slave out returns a duplicate of Modbus slave in.

values read returns the holding register values.

error out contains error information. This output provides standard error out functionality.