MODBUS RTU, RTU over TCP

HMI Setting

Address Range Limit

The address range for device types 0x, 1x, and 0x_multi_coils can be configured. This option should be used when the controller's bit register address range is not a multiple of 16. For example, if the range is 0x1 ~ 0x6 or 0x9 ~ 0x14, communication will not be possible. To ensure effective communication between the HMI and the controller, please follow the configuration instructions below.

Example: 0x-1~6

Configuration dialog for 0x/1x Address Range:

• Station no.: 1
• Address type: 0x
• Min. address: 1
• Max. address: 6

Note: Use 0x_1~0x_32 (1x_1~1x_32) to define multiple different 0x (1x) address ranges.

Example: 0x-1~9~14

Configuration dialog for 0x/1x Address Range:

• Station no.: 1
• Address type: 0x_1
• Min. address: 9
• Max. address: 14

Note: Use 0x_1~0x_32 (1x_1~1x_32) to define multiple different 0x (1x) address ranges.

Conversion

The 3x_Double and 4x_Double address types are added. If the [ABCD ->CDAB] check box is selected, please select 3x_Double and 4x_Double address types.

Note: The Conversion dialog allows setting the data format for device types 3x, 4x, 6x, 3x_Double, and 4x_Double. Options include byte swapping (AB -> BA) and word swapping (ABCD -> DCBA). AB represents a 16-bit type, and ABCD represents a 32-bit data type.

PLC Setting

Device Address

Notes

• Note1: MAX1W and 4X_32Bit read/writes 1 word for each packet and displays a 32-bit value, whereas MAX2W reads/writes 2 words for each packet.
• Note2: Go to the [System Parameter Settings] -> [Device Properties] and click [Conversion] to set the data format of device types 3x, 4x, 6x, 3x_double, 4x double.
• Note3: Read/write a Bit at a time. Value 0 and 1 are used to represent ON or OFF status where 0 means set OFF and 1 means set ON.
• Note4: The number of bits to read can be set in Macro; therefore, it is recommended to use 0x address type for functions such as GetData() and SetData(), in order to increase reading speed. To read/write multiple 0x address type in macro, use 0x_multi_coils to increase write speed.
• Note5: Please assign all the addresses to Even addresses, or all to Odd addresses, in order to prevent communication failure.
• Note6: EBPro V6.03.02 or later supports 64 bits data type (cMT Series only), but please note that the address limit range is 48 bits in maximum.

Additional Notes

Address type "5x" is mapped to Holding Register. The communication protocol of 5x is almost the same as "4x" except that "5x" swaps double word.

4x Data Example

5x Data Example

Modbus RTU Function Code

Wiring Diagrams

Diagram 1: RS-232

The serial port pin assignments may vary between HMI models. Please refer to the specific HMI documentation for exact details.

Diagram 2: RS-485 4W

The serial port pin assignments may vary between HMI models. Please refer to the specific HMI documentation for exact details.

Diagram 3: RS-485 2W

The serial port pin assignments may vary between HMI models. Please refer to the specific HMI documentation for exact details.