Modbus SIO Slave

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Connection Configuration
Communication Settings
Cable Diagram
Supported Devices

Command Format

Connection Configuration

IMPORTANT:

When using more than one driver with one Display (except SP-5B10), there are the following limitations as listed below.
The DH-485 driver of Rockwell Automation, Inc. cannot be used simultaneously.
The Uni-Telway driver of Schneider Electric SA cannot be used simultaneously.
The SIMATIC S7 MPI Direct driver of Siemens AG cannot be used simultaneously.
This driver (communication speed: 38400 or more) cannot be used with both COM1 and COM2.

1:1 connection

n:1 connection

NOTE

The number of Displays (Slaves) you can connect depends on the External Device. Check the specifications of the External Device.

Communication Settings

Examples of communication settings of the Display and the External Device, recommended by Pro-face, are shown.

WARNING

UNINTENDED EQUIPMENT OPERATION

Read and understand the instructions in this section to ensure data is properly transferred.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Cable Diagram

The following cable diagrams may be different from cable diagrams recommended by External Device Manufacturer.

Please be assured there is no operational problem in applying the cable diagram shown in this manual.

The FG pin of the External Device body must be grounded according to your country's applicable standard. Refer to your External Device manual for details.
SG and FG are connected inside the Display. When connecting the External Device to SG, design your system to avoid short-circuit loops.
Connect an isolation unit if the communication is not stable due to noise or other factors.

Supported Devices

Range of supported device address is shown in the table below. Please note that the actually supported range of the devices varies depending on the External Device to be used. Please check the actual range in the manual of your External Device.

WARNING

UNINTENDED EQUIPMENT OPERATION

Do not simultaneously write to the same register from Display and External Device program.
Do not write 16-bit word values to registers being accessed in a bitwise manner.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Command Format

This driver supports the commands below.

Function	Function code	Maximum Points
Read Coils	0x01	2000 bits
Read Discrete Inputs	0x02	2000 bits
Read Holding Registers	0x03	125 words
Read Input Registers	0x04	125 words
Write Single Coils	0x05	1 bit
Write Single Register	0x06	1 word
Diagnostics	0x08 / 0x00, 0x00	-
Write Multiple Coils	0x0F	1968 bits
Write Multiple Registers	0x10	123 words
Mask Write Register	0x16	1 word
Read/Write Multiple Registers	0x17	read: 125 words write: 121 words
Read Device Identification^*1	0x2B / 0x0E	-

*1 Read Device Identification

Object ID	Object Name	Notes
0x00	VendorName	Vendor name Pro-face
0x01	ProductCode	Product Code. In the equipment settings, when the [Product Code] is not set, the model name is replied. e.g. ST-6500WAD
0x02	MajorMinorRevision	Runtime version e.g. 3.0.0.42
0x03	VendorUrl	Vendor URL www.pro-face.com
0x04	ProductName	Product name BLUE
0x05	ModelName	Model name e.g. ST-6500WAD
0x06	UserApplicationName	Project name / Target name e.g. Project1/Target01