8 Communications Functions
8 - 10
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
8-3 Explanation of Each Function Code
Reads the coil status (ON/OFF).
In the 3G3RX-V1 Series Inverter, Read Coil Status function of Modbus communication was
changed to use the same byte order as that of the 3G3MX2 Series when transferring data over 1
byte.
Receive data in the data layout as shown below, according to the number of data bytes to be
read.
• Data received as 1-byte data (1 to 8 coils)
• Data received as 2-byte data (9 to 16 coils)
• Data received as 3-byte data (17 to 24 coils)
• Data received as 4-byte data (25 to 32 coils)
Example
To read data from multi-function input terminals S1 to S6 of the inverter with slave address 8.
The status of each multi-function input terminal is as follows.
Coil numbers 000D hex and 000E hex are OFF.
Read Coil Status [01 hex]
Coil 8 to Coil 1
Coil 8 to Coil 1 Coil 16 to Coil 9
Coil 8 to Coil 1 Coil 16 to Coil 9 Coil 24 to Coil 17
Coil 8 to Coil 1 Coil 16 to Coil 9 Coil 24 to Coil 17 Coil 32 to Coil 25
Item Data
Multi-function input terminal S1 S2 S3 S4 S5 S6
Coil number 0007 hex 0008 hex 0009 hex 000A hex 000B hex 000C hex
Terminal status ON ON ON OFF ON OFF
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