Software for MOD Bus Interface
Full Lighting Controls
Software
Background
Most of the new building’s automatic control system is divided into a mechanical
section and an electric power lighting section. Therefore, in most cases, the
automatic mechanical control system and the electric automatic control system
are separately supplied and installed in order to integrate and operate these
system. In this case, you can used the MOD Bus method, an international
standard communication protocol that can interface most conveniently.Our ELC System is equipped with MOD Bus Port in hardware in SCU, which is the main communication device. This MOD registration menu is also prepared in Smartrol, the setting program of ELC System, so you can easily interface with other company’s automatic control system.
Using this MOD Bus setting program, the ELC lighting control system is seamlessly integrated and operated in the interface between the following systems.
Equipment automatic control system
Power monitoring system
Integrated SI system
Railway station and tunnel system
Industrial system
Overview
ELC System, our lighting control system, is a system operated by a proprietary
communication protocol. For interfaces with other systems, a port that supports MOD
Bus communication was additionally prepared. The hardware connection method is
connected with the existing UTP cable using the MOD Bus / TCP method. Ports for
these interfaces are prepared in the SCU (System Communication Unit). And the main
communication protocol is prepared with the following basic elements. Relay Panel Function : Various relay control modules (4sRM, 6sRM, 4eRM, etc) Relay On/Off Command
Relay On/Off Command
Relay On/Off State
Relay Fail State / Clear
Group PSS Switch On/Off
Switch Panel Function : Various switches (DSW-4,-8, TS-4,-8,STS) Switch On/Off State
Switch On/Off State
SCU Date & Time, etc.
MOD Bus TCP Protocol strucure
The protocol structure for our ELC and MOD Bus Interface is as follows,
and only one connection is allowed when connecting to TCP/IP. Head(Transaction ID(2)+Protocol ID(2)+Length(2)+MODBUS Message(n)
| Modbus RTU | ||||||
| Transact ID | Protocol ID | Length | Slave Address | Function Code | Error Code | CRC |
| 2 Byte | 2 Byte | 2 Byte | 1 Byte | 1 Byte | 1 Byte | 2 Byte |
| Modbus TCP | ||||||
Main program setting screen
Dimension of Layout
Connection Diagram