Internal Address 0 to 65535 for Modbus Function Code 1, 2, 5, or 15. This field specifies the internal database register to be associated with the command. If the command is a read function, the data read from the slave device will be placed starting at the register value entered in this field. If the command is a write function, the data written to the slave device will be sourced from the address specified.This parameter specifies the minimum interval between executions of a continuous commands (Enable code of 1). The value is in seconds. Therefore, if a value of 10 is entered, the command will execute no more frequently than once every 10 seconds.
The Reg Count parameter specifies
the number of registers or digital points to be associated with the command. Functions 5 and 6 ignore this field as they only apply to a single data point. For functions 1, 2 and 15, this parameter sets the number of digital points (inputs or coils) to be associated with the command. For functions 3, 4 and 16, this parameter sets the number of registers to be associated with the command. This parameter defines if the data received from the Modbus slave is to be ordered differently than received from the slave device. This parameter is helpful when dealing with floating-point or other multi-register values, as there is no standard method of storage of these data types in slave devices. This parameter can be set to order the register data received in an order useful by other applications.
Node Address
This parameter specifies the Modbus slave node address on the network to be considered. Values of 1 to 255 are permitted. Most Modbus devices only accept an address in the range of 1 to 247 so be careful. If the value is set to zero, the command will be a broadcast message on the network. The Modbus protocol permits broadcast commands for write operations. Do not use this node address for read operations.This parameter specifies the Modbus function to be executed by the command. These function codes are defined in the Modbus protocol. The following table defines the purpose of each function supported by the module.
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