Read Coils VI

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

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.

number of coils specifies the number of coils you want to read. Valid values are between 1 and 65,536, where 65,536 is the maximum number. After you specify a value for number of coils, check the value you specify for starting address. Ensure that you do not use this VI to read the value of a coil 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.

Modbus slave out returns a duplicate of Modbus slave in.

coil values returns the coil values.

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