User's Manual
4. HOW TO MONITOR REDUNTANT SYSTEM
4.2 Direct CPU Connection
4 - 15
1
PREPARATORY 
PROCEDURES FOR 
MONITORING
2
DEVICE RANGE 
THAT CAN BE SET
3
ACCESS RANGE 
FOR MONITORING
4
HOW TO MONITOR 
REDUNTANT 
SYSTEM
5
BUS CONNECTION
6
DIRECT 
CONNECTION TO 
CPU
7
COMPUTER LINK 
CONNECTION
8
ETHERNET 
CONNECTION
1. Set the screen switching device of the base screen.
Choose [Common]   [GOT Environmental Setting]   [Screen Switching/Window], and set the internal device 
GD100 as the base screen switching device.
(Do not use PLC CPU devices for the screen switching device. If used, the Status Observation operation of the GOT 
may be disabled since the device data of the PLC CPU is overwritten by the device value transferred with the 
redundant system tracking function)
2. Set the Status Observation.
Make the setting so that the base screen 1 is displayed when the connected PLC CPU is the standby system 
(SM1515 is OFF) in the project specified by selecting [Common]   [Status Observation].
Create the status observation in the project on the Project tab.
Condition 1 : SM1515 (while OFF)   When the SM1515 is OFF, the connected PLC CPU is the standby system.
Operation : GD100=1   The screen switches to the base screen 1.










