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Mitsubishi Electric FX5 User Manual Page 142

Melsec iq-f series.
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Precautions
• The RS2 instruction cannot be used in the same serial port as that of the inverter communication instruction and predefined
protocol support instruction.
• To change the header, terminator, time-out time or 8-bit processing mode, do so before the RS2 instruction is driven (while
off). The change is enabled when the RS2 instruction is driven. While the RS2 instruction is being driven, do not change the
header, terminator, time-out time or 8-bit processing mode.
Applicable frames
Message frames used in communication can be selected by setting the communication parameter.
The table below shows message frames applicable to the RS2 instruction.
1
2
3
4
5
6
7
Header
8
Header
9
Header
10
Header
11
Header
12
Header
■Header
When headers are set in the communication settings (Page 136), the set values are stored in SD8623 and SD8624 for
CH1, SD8633 and SD8634 for CH2, SD8643 and SD8644 for CH3 and SD8653 and SD8654 for CH4.
Up to four headers can be set.
Header
CH1
CH2
CH3
CH4
When data is sent, the stored data in the devices above is added at the head of the specified send data.
When data is received, receiving of the data begins when the stored data in the devices above is received continuously.
If the first header value is 00H, the header settings are not configured. The area before 00H (in 1-byte units) is used to set the
headers.
5 NON-PROTOCOL COMMUNICATION
140
5.7 Programming
Data
Data
CR+LF
Data
Terminator
Data
Terminator
Data
Terminator
Data
Terminator
Data
Data
CR+LF
Data
Terminator
Data
Terminator
Data
Terminator
Data
Terminator
FX5 dedicated
First header
Second header
SD8623 (Low-order byte)
SD8623 (High-order byte)
SD8633 (Low-order byte)
SD8633 (High-order byte)
SD8643 (Low-order byte)
SD8643 (High-order byte)
SD8653 (Low-order byte)
SD8653 (High-order byte)
CR+LF
Sum check
Sum check
CR+LF
CR+LF
Sum check
Sum check
CR+LF
Third header
SD8624 (Low-order byte)
SD8634 (Low-order byte)
SD8644 (Low-order byte)
SD8654 (Low-order byte)
Fourth header
SD8624 (High-order byte)
SD8634 (High-order byte)
SD8644 (High-order byte)
SD8654 (High-order byte)

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