Mitsubishi QJ71C24N User Manual page 219

8 DATA COMMUNICATION USING THE PRE-DEFINED PROTOCOL
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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(2) Communication data
In the program example, the predefined protocol communication described below
is performed between QJ71C24N and the target device.
(a) Target device and protocols
Connect the QJ71C24N 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
D300 Inverter
station number
D201 Operation
mode value
Manufacturer
Device name
Protocol name
(b) 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
Check
Terminator
code
D201
Operation
Header
mode value
Mitsubishi Electric
FR-A700
H7B:RD Operation Mode
Packet type
Send packet
Receive packet
Receive packet
MELSEC-Q
FREQROL-A700
D300
Inverter
Header
station number
Check
Terminator
code
Data storage area
specification
D300
D200
D201
D202
D203
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