Communication Data - Mitsubishi Melsec-L Series User Manual

9.5.2 Communication data

Set the inverter
station number
in the CPU device
(D300)
Store the operation
mode value
in the CPU device
(D201)
Packet name
H7B:RD Operation Mode
NOR:RD Data(4 Digits Data)
ERR:NAK Response
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In the program example, the predefined protocol communication described below is
performed between LJ71C24 and the target device.
(1) Target device and protocols
Connect the LJ71C24 and the inverter and read out the operation mode values of
the inverter.
Set the inverter station number to CPU device (D300) and send it, and store the
operation mode value in CPU device (D201).
CPU
CPU
Device
Inverter
D300
station number
Terminator
Operation
D201
mode value
Header
Manufacturer
Device name
Protocol name
(2) Storage devices for send/receive data, buffer memory assignment
Specify the device memory of a CPU module and buffer memory as the data
storage areas as shown in the table below, and send/receive data.
Element name
Inverter Station Number
Inverter Station Number
Read Data
Inverter Station Number
Error Code
9 DATA COMMUNICATION USING THE PREDEFINED PROTOCOL
D300
Check
Inverter
code station number
D201
Check
Operation
Terminator
code
mode value
Mitsubishi Electric
FR-A700
H7B:RD Operation Mode
Packet type
Send packet
Receive packet
Receive packet
FREQROL-A700
Header
Data storage area
specification
D300
D200
D201
D202
D203
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