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Rev Version 1.4.1
Rev Version 1.4.1
Figure 60 Modbus TCP Client Mapping
Enable Modbus TCP
Client
Select this checkbox to enable the Modbus TCP client and display the client
parameters.
Scan Rate
Sets how frequently the device will be polled.
Add Entry
Adds a default mapping to the table. Edit the entry to configure the parameters to
match the application.
Delete Entry
Removes the selected mapping.
Local Register
Enter the starting on-board I/O register number that the specified Modbus master
transaction will transfer I/O to/from.
I/O Count
Specify the number of consecutive I/O registers to be transferred for the specified
transaction.
Function Code
Specify the Modbus Function Code for the transaction:
•
01 Read Coil
—Reads the on/off status of a digital output in the slave device (for
example, DO status, 0X register).
•
02 Read Discrete
—Reads the on/off status of a digital input in the slave device
(for example, DI status, 1X register).
•
03 Read Registers
—Reads the analog value of a holding register in the slave
device (for example, AO status, 4X registers).
•
04 Read Inputs
—Reads the analog content of input registers in the slave device
(for example, AI status, 3X registers).
•
15 Write Coils
—Writes an on or off value to a digital output in the slave device
(for example, DO or 0X register).
•
16 Write Registers
—Writes an analog value into a holding register in the slave
device (for example, AO, 4X register).
Destination Register
Enter the starting I/O register number in the destination device that the specified
Modbus master transaction will transfer I/O to/from.
