Mitsubishi Electric LE7-40GU, Instruction Manual, Page: 69 / 154

5 MODBUS/TCP (SLAVE)
5.2 Communication Setting
67
5
Function code
The LE7-40GU (slave) supports the following function codes (subfunction codes).
Continuous setting/continuous monitoring
Data specified in advance can be set and monitored continuously by setting the continuous setting execution (RY2E) and
continuous monitor execution (RY2E) in the master station to ON.
For continuous setting data, the data set for RAM writing is not stored during a power failure.
The latest data existing in LE7-40GU when the master station gives the send request can be monitored continuously.
However, regarding the update of parameters for which the monitor update cycle is specified by the setting in LE7-40GU, the
data is updated in the specified update cycle if the specified update cycle is longer than the monitor update cycle in the send
request given by the master station.
Continuous settings
1.
Data write to devices with continuous settings 1 to 16
2.
Turn on continuous settings execution
Continuous monitor
1.
Turn on continuous monitor execution
2.
Read the data of the devices of continuous monitors 1 to 16
Function code
(Subfunction code) Function Number of accessible device one [unit: points]
0x01 Read Coils 1 to 2000
0x02 Read Discrete Inputs 1 to 2000
0x03 Read Holding Registers 1 to 125
0x04 Read Input Registers 1 to 125
0x05 Write Single Coil 1
0x06 Write Single Register 1
0x0F Write Multiple Coils 1 to 1968
0x10 Write Multiple Register 1 to 123