5 MODULE DEDICATED INSTRUCTION
5.3 Serial Communication Instruction
87
5
Setting data
Program example
• The following program reads out the registration data of the user frame number 3E8H. (For the Q series C24 whose I/O
signals are X/Y80 to X/Y9F)
Device
Item
Setting data
Setting range
Setting side
(s1)[0]
Dummy
0
(s1)[1]
Read result
The instruction completion status is stored.
0: Normal completion
Other than 0: Error completion (error code)
System
(s1)[2]
Frame No.
specification
Specify the user frame number.
1000 to 1199
User
(s1)[3]
Allowable number
of bytes for read
data
Specify the maximum number of bytes for storing the registered data
of the read user frame to (s2).
1 to 80
User
Number of
registered bytes
The number of bytes of the registered data for the read user frame is
stored.
1 to 80
System
[Structured ladder/FBD]
Read request pulse
Sets user frame number
Sets allowable number
of bytes for read data
Clears user frame
to 0
Reads user frame
Turns normal
completion flag ON
Turns error
completion flag ON
Содержание MELSEC System Q
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