DAUDIN Delta PLC Modbus RTU Connection User Manual
- June 9, 2024
- DAUDIN
Table of Contents
Delta PLC Modbus RTU Connection
User Manual
2302EN
V1.0.0
and Delta PLC
Modbus RTU Connection
Operating Manual
Remote I/O Module System Configuration List
| Part No. | Specification | Description |
|---|---|---|
| GFMS-RM01S | Master Modbus RTU, 1 Port | Main Controller |
| GFDI-RM01N | Digital Input 16 Channel | Digital Input |
| GFDO-RM01N | Digital Output 16 Channel / 0.5A | Digital Output |
| GFPS-0202 | Power 24V / 48W | Power Supply |
| GFPS-0303 | Power 5V / 20W | Power Supply |
| 0170-0101 | 8 pin RJ45 female connector/RS-485 Interface | Interface Module |
1.1 Product Description
I. The interface module is used externally to convert Delta PLC RS485’s
communication port (Modbus RTU) to a RJ45 connector
II. The main controller is in charge of the management and dynamic
configuration of I/O parameters and so on.
III. The power module and interface module are standard for remote I/Os and
users can choose the model or brand they prefer.
Delta PLC Connection Setup
This chapter explains how to use the ISPSoft program to connect Delta PLC with
.
For detailed information, please refer to ISPSoft User Manual
2.1 Delta PLC Hardware Connection
I. The connection port is at the bottom of the machine. Using DVP-14SS2 for
demonstration, connect Port 2(RS485 A/B) to the interface module (1/2) to
convert it into a RJ45 connection, which will be connected to the main
controller.
2.2 Delta PLC Connection
Setup
I. Launch ISPSoft and set COM2’s communication settings to the RTU mode,
115200bps, 8 data bits, None parity and 1 stop bits (115200, 8,N, 1).
Programming Example:
※The communication parameter setting must be consistent with
to enable communication
II. Use the MODRW command to setup the reading/writing of 
’s I/O
module
S1: Connected device addresses: K1~K254
S2: Communication function code
S3: The address where data will be read/written
S: The register where the data to be read/written is tored
N: Length of the data to be read/written
※ ’s first GFDI-RM01N has the register address at 1000(HEX)
※ ’s first GFDO-RM01N has the register address at 2000(HEX)
※Note: When using the read command, please use register D1296 to start using
the stored data
Use the “read” command above to set up D200 to read 2 registers with first
point of DI as the example.
| Register | DATA | Description |
|---|---|---|
| D200 (Low- order byte) | “0” | ADR 1 ADR 0 |
| D200 (Highoder byte) | ||
| D201 (Low- order byte) | CM D 3 |
C MD 0
D201 (High- order byte)| “3”
D202 (Low- order byte)| 44044| Data Bytes
D202 (High- order byte)| “2”
D203 (Low- order byte)| 44044| Content at the address 2100 I-1| PLC will
automatically convert ASCII
characters into values and store them at D1296=H0001
D203 up| 4,019
D204 down| 44044
D204 up| 4414,
D205 down| 440,4| Content at the address 2101 1-1| PLC will automatically
convert ASCII
characters into values and store them at D1297=1-10000
D205 up| 44044
D206 down| 4404,
D206 up| 440,4|
D207 down| LRC CHK 1|
D207 up| LRC CHK 0
Based on this table, users can use D1296 register to read the entire data
(Word).
III. rogramming Example:
This example is for communications and using RS485 communication to
read/write
module
