Omron 3G3JX User Manual

4-80
4-2 Function Mode
4
Functions
ModBus Communication Protocol
Follow the procedures below in regard to communication between the external controller and the
Inverter.
(1): Frame to be sent from the external controller to the Inverter (Query)
(2): Frame to be returned from the Inverter to the external controller (Response)
The Inverter returns a response (Frame (2)) only after receiving a query (Frame (1)) and does not
output a response positively.
Each frame format (command) is shown below.
Message configuration: Query
<Slave Address>
•Pre-set numbers ranging from 1 to 32 in each Inverter (slave). (Only the Inverter having the same
slave address as the query takes in the query.)
•Broadcasting can be performed by setting the slave address to "0".
•Data call or loopback cannot be performed while broadcasting.
<Data>
•Sends the function command.
•The 3G3JX corresponds with the following data formats used in the ModBus.
<Function Code>
•Specifies a function for the Inverter to perform.
•The function codes available to the 3G3JX are shown on the next page.
Header (Silent interval)
Slave address
Function code
Data
Error check
Trailer (Silent interval)
Data name Description
Coil Binary data (1-bit long) that can be referred to or changed
Holding register 16-bit long data that can be referred to or changed
External controller
Inverter
(1)
(2)
Time
Wait time (silent interval +C078)

Omron 3G3JX Specifications

General

Model	3G3JX
Category	Inverter
Control Method	V/f control
Input Frequency	50/60 Hz
Communication Interface	RS-485 (optional)
Operating Temperature	-10 to 50°C
Humidity	20 to 90% RH (non-condensing)
Enclosure Rating	IP20
Input Voltage	200 to 240 V AC
Output Voltage	Three-phase 200 to 240 V AC
Output Frequency	400 Hz
Protection	Overcurrent, Overvoltage, Undervoltage, Overheat
Communication	RS-485
Braking Unit	Built-in
Power Range	0.1 to 15 kW
Cooling Method	Fan-cooled
Storage Temperature	-20°C to +65°C
Altitude	Up to 1000 m