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Starting and Stopping Data Links Section 5-3
5-3-1 Using a Programming Device or the User Program
Set the software switch (AR or DM Start Bit) in the PLC to ON using a Pro-
gramming Device or from the user program.
The data links will start when the Start Bit changes from OFF to ON or is
already ON when power is turned on. The data links will stop when the Start
Bit changes from ON to OFF.
Note The data in the AR and DM Areas is retained when power is turned off. There-
fore, by setting in the AR and DM Areas can be made in advance to start data
links as soon as power is turned on.
It is recommended to set the Start Bit to ON in multiple nodes that are partici-
pating in the data link so that the data links will start even if the startup node is
down. The same data link settings must be set in these nodes for automati-
cally set data links.
CS/CJ-series Start Bit
C200HX/HG/HE Start Bit
Programming Device
User program
Startup node
Controller Link
CS/CJ-series PLCs
Turn ON the Start Bit in DM 30000 + 100 × N.
(N: unit number)
C200HX/HG/HE PLCs
Turn ON the Start Bit in AR 07
CVM1 and CV-series PLCs
Turn ON the Start Bit in DM 2000 + 100 × N.
(N: unit number)
CQM1H-series PLCs
Turn ON the Start Bit in AR 07.
+
CX-Net
(in CX-Programmer)
Data link Start Bit
Start: Changed from OFF to ON or set to ON
when power is turned on
Stop: Changed from ON to OFF
15 14 13 12 11 10 9 8 765 4 3 210
Word N
N: DM 30000 + 100 × (unit number)
Data link Start Bit for level 0 (AR 0700)
Start: Changed from OFF to ON or set to ON
when power is turned on
Stop: Changed from ON to OFF
Data link Start Bit of level 1 (AR 0704)
Start: Changed from OFF to ON or set to ON
when power is turned on
Stop: Changed from ON to OFF
15 14 13 12 11 10 9 8 765 4 3 210
AR 07