Owner's manual

3-3
IM WX1-05E
1
2
3
Index
Detailed Description Functions
3.2 Detailed Description of Functions
Communication Port
The communications ports available to GateMODBUS are the COM1–COM9 serial
(RS-232) ports the Ether1 to Ether16 Ethernet ports. The following items are specified in
the Serial Setting tab.
Serial port setting
• Baud rate (4800, 9600, 19200, or 38400 bps)
• Parity (None, Even, or Odd)
Ethernet port setting
• IP address or host name
• Password
Note
The Modbus protocol’s RTU (remote terminal unit) mode prescribes stop bit 2 for no parity, and
stop bit 1 for odd or even parity.
Modbus Communications
GateMODBUS supports communications using the Modbus/RTU (serial) and Modbus/
TCP (Ethernet) protocols. The functions and registers used by GateMODBUS for data
logging are as follows:
Function 03 04
Description Read holding register Read input register
Register numbers that can be loaded: 40001–49999 400001–465535
30001–39999 300001–365535
Also, you can execute the following functions on the configurator to display the
connection status with Modbus devices.
Function 08
Sub-function 00
Description Loop back test
Note
GateMODBUS does not support the Modbus protocol’s Modbus/ASCII mode.