VRF SYSTEMS

the best technology in AIR CONDITIONING

Modbus® Gateway

Integrated Control System for Seamless
Connection between VRF and BMS Systems

What Is The Modbus?

Modbus is a serial communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Modbus is often used to connect a supervisory computer to a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems.

Key Features

  • Supports Modbus protocol networks
  • Bridges the Mitsui central A/C system to BMS
  • Built-in WEB server function
  • Connect to the BMS system through TCP/IP or RTU.
  • Connect up to 16 indoor or 64 indoor units and 4 outdoor units

*4 outdoor units must be in the same system

Controlling

  • Operation mode setting
  • Set temperature setting
  • Fan speed setting

Monitoring

  • Operation mode status report
  • Set temperature status report
  • Timer status
  • Fan speed status report
  • RC locking status
  • Online/offline status
  • Error status
  • Room temperature display

*If it connects to XYE ports of master ODU, ODU must be set to auto addressing mode.

TECHNICAL DATA

Network Example

1. TCP connection method

2. RTU connection method

*1. If it connects to XYE ports of master ODU, ODU must be set to auto addressing mode.
*2. XYE and K1K2E must be connected hand by hand.

Config A/C System Via Web

When the Modbus network is set, users can conveniently configure their A/C network system over the Internet using different TCP/IP browsers.