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5.3 Serial Communication
5.3.1 ONDEMAND instruction
G_ONDEMAND
5.3 Serial Communication
5.3.1 ONDEMAND instruction
G_ONDEMAND
*1: Local devices and file registers per program cannot be used as setting data.
Function
This instruction sends data using the on-demand function of MC protocol.
G(P)_ONDEMAND
P: Executing condition
:
indicates any of the following
instructions.
G_ONDEMAND GP_ONDEMAND
Input argument EN:
Executing condition :Bit
Un*:
Start I/O number of the module
(00 to FE: Higher two digits when expressing the I/O number in
three digits)
:ANY16
s1:
Variable that stores control data :Array of ANY16 [0..2]
s2:
Start number of the device that stores send data :ANY16
Output argument ENO:
Execution result :Bit
d:
Variable that turns ON upon completion of the instruction
d[1] also turns ON at the time of error completion.
:Array of bit [0..1]
Setting
data
*1
Internal device
R, ZR
J\
U\G
Zn
Constant
Others
Bit Word Bit Word
Serial
Structured ladder/FBD
ST
G_ONDEMAND
EN ENO
Un*
s1
s2
d
G_ONDEMAND
(EN, Un*, s1, s2, d);ENO:=
s1
s2
d