IDEC FS1A Controller - Manual (Page 82)

5-41
Operation example (Logic 5)
Open!
Open!
Open!
Close
Close
Close
Interlock switch A
Interlock
switch B
Interlock switch A
（
Single contact ）
Interlock switch B
（
Single contact)
Interlock switch A
（
Single contact ）
Interlock switch B
（
Single contact ）
Contact ON
（ Door is closed）
Contact OFF
（ Door is opened）
Input monitor error detection time is 0.5s.
Input monitor error detection time is infinite.
Contact ON
（ Door is closed）
safety input device is checked.
Input monitor error
detection time is
exceeded.
Input monitor error is detected.
As the result of input monitor
error detection time is infinite,
the error is not detected.
Safety output is turned off.
STOP
Production machinery
In case of Logic 1
In case of Logic 5
∞
Contact OFF
（ Door is opened）
Contact OFF
（ Door is opened）
Contact OFF
（ Door is opened）
Contact ON
（ Door is closed）
Contact ON
（ Door is closed）
The syncronizations of each
Contactor/
safety relay OFF
Press!
Open!
or
Machine stop
Solenoid output ON
Guard lock release
・ Emergency stop switch is pressed
or
・ Movable guard is opened.
(Contacts of 1 of the interlock switches
are OFF)
・ Safety outputs are OFF.
・ Solenoid outputs are ON.
・ Safety outputs are ON.