Mitsubishi MELSEC Q Series Reference Manual page 320

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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(b) Switching instruction
This data designates which mode switching will be performed.
1) Data communication in ASCII code
The value shown below is converted to a 2-digit (hexadecimal) ASCII
code and sequentially transmitted beginning from the most significant
digit.
2) Data communication in binary code
The 1-byte value shown below is transmitted.
3) The designated values and mode switching to be performed in the
switching instruction are shown below.
When all bits are 0 (OFF), the mode switching is performed according
to each switching setting in the programming tool.
(c) Mode number
This data is for designating the communication protocol setting after the
mode is switched.
1) Data communication in ASCII code
The 2-digit (hexadecimal) ASCII codes are specified in the table below.
Transmit from the most significant digit.
(Example: if the code is "01", transmit from "0".)
Designated value
ASCII
01
02
03
04
05
06
07
09
FF
1 To set the "MELSOFT connection" or "GX Developer connection" mode in the intelligent function
module switch setting of the programming tool, specify "00H" in the communication protocol setting.
(Refer to the User's Manual (Basic).)
2) Data communication in binary code
Transmit using the 1-byte value (01
3) When the "mode number (operation mode) switching instruction" of
indicated in (b) above is "0", designate a dummy value of "01" to "07,"
"09", and "FF" (ASCII code) in this section. Do not designate "0".
Binary
01 MC protocol (format 1)
H
02 MC protocol (format 2)
H
03 MC protocol (format 3)
H
04 MC protocol (format 4)
H
05 MC protocol (format 5)
H
06 Non procedure protocol
H
07 Bidirectional protocol
H
09 Communication protocol
H
MELSOFT connection, GX Developer connection
FF
H
Mode number (operation mode)
to 07 , 09 FF ) shown in 1).
H H H H
1
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