Mitsubishi MELSEC Q Series Reference Manual page 99

[Example]
External device
Q series C24
Station number 0
PC number FF
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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(Multidrop connection)
Q series C24
Station number 1
PC number FF
H H
REMARKS
It is not necessary to set the station numbers in ascending order as in the diagram
above. Even when station number 31 is set first, the communication is performed
normally.
• Network number and PC number
These values identify the number of the network system that is passed through
last and the PC number (Station number) on the relevant system according to the
setting number of the network module when an external device accesses
programmable controller of another station.
• Request destination module I/O number and request destination module station
number
Designate the connection source programmable controller CPU and access
destination programmable controller CPU of the multidrop connection when an
external device accesses programmable controller of another station through a
network system and multidrop connection programmable controller CPU.
The request destination module I/O number designates the multidrop connection
source C24 by the head number of the input/output signals.
The request destination module station number designates the C24 to be
accessed according to the station number of the C24 in the settings.
• Self-station number
Designates the external device's station number (local station number) by the
number "0" (preset value).
a) Station number
1) Data communication in ASCII code
Must be in the 00
(hexadecimal) ASCII code and sequentially transmitted beginning from the
most significant digit.
2) Data communication in binary mode
A 1-byte value from "00
Q series C24
Station number 2
PC number FF
H
to 1F (0 to 31) range. The data is converted to 2-digit
H H
" to "1F " (0 to 31) is used for transmission.
H H
Q series C24
Station number 31
PC number FF
H
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