Time Until Arrival At Safety Speed (Un019 And Un01A) - YASKAWA E-V Series User Manual

9.2.4 Time until Arrival at Safety Speed (Un019 and Un01A)

This monitor mode displays the time period until the motor reaches a safe speed after the safety request signal
is input.
Parameter
No.
Un019 Time A until Arrival at Safety Speed
Un01A Time B until Arrival at Safety Speed
The measurement of the time period until the motor reaches a safe speed depends on the selected safety func-
tion as shown below:
Safety Function
SBB
SBB-D
SPM-D
SLS-D
The characteristics of measuring the time period until the motor reaches a safe speed are as follows:
• The time period is measured from the time the safety request input state turns ON until the motor speed
reaches the safe speed.
• The measured time is updated whenever the motor speed reaches the safe speed.
• Monitoring is performed until the safety request input state turns OFF.
The specifications of measuring the time period until the motor reaches a safe speed are shown below.
Example: When the SBB-D Function Is Selected as the Safety Function
Safety request
ON
input state A
Motor speed
0
Name
The time period until the motor reaches a safe speed is not measured.
The value is always "0."
The time period is measured by assuming that a speed value within the speed detection error
is the safe speed.
The time period is measured by assuming that a speed value within the speed detection error
is the safe speed.
The time period is measured by assuming that the constant monitoring speed is the safe
speed.
Operation Timing
OFF (Safety Function Execution Request)
Monitoring speed
Safe speed
t1
t2
t3
9.2 Monitoring from the Panel Operator and Digital Operator
Unit
ms
ms
Measurement of Safe Speed
ON
In the figure, the measured time
is updated from t1 to t2, and
finally to t3.
Remarks
Initial display after system
reset: 0
Remarks
9-7