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MELSEC-Q
8 DATA COMMUNICATION USING THE PRE-DEFINED PROTOCOL
(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
D300
D201
Set the inverter
station number
in the CPU device
(D300)
Operation
mode value
Inverter
station number
FREQROL-A700
CPU
Device
Check
code
D300
Inverter
station number
Header
Check
code
Operation
mode value
Store the operation
mode value
in the CPU device
(D201)
Terminator
Header
Terminator
D201
Manufacturer Mitsubishi
Electric
Device name
FR-A700
Protocol name
H7B:RD Operation Mode
(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.
Packet name
Element name
Packet type
Data storage area
specification
H7B:RD Operation Mode
Inverter Station Number
Send packet
D300
Inverter Station Number
D200
NOR:RD Data(4 Digits Data)
Read Data
Receive packet
D201
Inverter Station Number
D202
ERR:NAK Response
Error Code
Receive packet
D203
Summary of Contents for MELSEC QJ71C24
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Page 103: ...3 42 3 42 MELSEC Q 3 SPECIFICATIONS MEMO ...
Page 177: ...6 33 6 33 MELSEC Q 6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL MEMO ...
Page 397: ...App 24 App 24 MELSEC Q APPENDIXES Connection example 3 Connection example 4 ...
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