YASKAWA E-V Series User Manual page 114

6 Safety Functions
(2) Operation Example
 Safety Function A
<When Door Switch Is Closed>
The X1 signal of the Safety Controller is OFF and the S14 and the S24 signals are ON. Signals /SRI-A1 and 
/SRI-A2 both are ON and Safety Function A (SLS-D function) does not operate. Normal operation is exe-
cuted.
<When Door Switch Is Opened>
The X1 signal of the Safety Controller turns ON and the S14 and the S24 signals turn OFF. Due to the state of
the X1 signal, the host controller switches from the normal operation reference to a deceleration reference
toward the speed limit. The Safety Module monitors the speed. If the speed is within the specified Limited
Constant Speed (Pc14) after the specified Deceleration Monitoring Time (Pc11) has elapsed, the EDM-A sig-
nal turns ON.
<When the Door Switch Closes after Opening>
If the speed is within the speed limit, the EDM-A signal remains ON. If the door switch is closed in this state,
the X1 signal turns OFF and the S14 and the S24 signals turn ON because the Safety Controller is in the Auto
Reset state. Due to the state of the X1 signal, the host controller switches from the speed limit operation refer-
ence to the normal operation reference, and normal operation is returned.
SLS-D function operation state
6-32
Door switch is closed
Door switch
X1 signal
Operation reference Normal operation reference
SERVOPACK state
S14 signal, /SRI-A1
S24 signal, /SRI-A2
T31/T33 signal, EDM-A
Operation Timing
Door switch is open
Speed limit
Deceleration
operation reference
reference
Servo ON state
Deceleration Speed
monitoring monitoring
Door switch is closed
Normal operation reference