KEYENCE SL-V Series - Manual (Page 31)

2-7
Fu
nct
ion
s and
Feat
ures
2
SL-V-M-NO2-E
2-4
Interlock Function
Interlock is a function to prevent that the OSSD automatically goes to the ON-state from the OFF-state.
You can prevent the unintended start-up and/or the unintended restart of the machine if the interlock is
applied to the SL-V.
You can determine whether the interlock function is enabled at start-up, at restart or both through the
SL-V Configurator (SL-VH1S).
In this sentence, start-up and restart means as follows.
Start-up:
1) When the power is supplied
2) When the SL-V is restored from lockout condition thorough reset input
Restart:
1) When the OSSD goes back to the ON-state from OFF-state, except for the start-up
On the other hand, you can also determine whether the interlock function is enabled at start-up and at
restart through the wiring method.
The setting of combination for start and restart interlock is as follows.
(X: available
-: not available)

Start mode
Automatic start mode: Interlock function does not work. The SL-V starts operation automatically without
the reset operation.
The OSSD goes to the ON-state automatically if the SL-V detects no interruption in the detection zone at
start-up.
This mode can be used for the machine that nobody can go into or approach the hazardous area with
only passing through the protection zone, or can be used if the safety-related part of a control system
other than the SL-V, such as safety relay unit, can ensure the safety with other means.
Manual start mode: Interlock function works. The SL-V starts operation if the SL-V receives the reset
operation.
The OSSD keeps the OFF-state at start-up (Interlock condition). It is necessary to perform the reset oper-
ation when the SL-V detects no interruption in the detection zone, in order that the machine starts opera-
tion. Because of reset operation, the OSSD goes to the ON-state, and then interlock condition is
terminated.
Unexpected/Unintended start-up of the machine or machinery can be prevented.

Restart mode
Automatic reset mode: Interlock function does not work. The SL-V starts operation automatically without
the reset operation.
The OSSD goes to the ON-state automatically at restart if the object detected by the SL-V is removed
from the detection zone.
Interlock Setting method
Start
Interlock
Restart
Interlock
SL-V wiring SL-VH1S
Automatic Automatic X X
Manual Automatic - X
Automatic Manual - X
Manual Manual X X
Cable
Self-diagnosis
Series Connection
Interlock
AUX
EDM
Wait
State Information
Alert
Clear/Blocked
Suspension
Fixed
Reduced
Monitoring