6-23
1
Before Using the Products
2
Preparation
3
Connection
4
Setup
5
Adjustment
6
When in T
rouble
7
Supplement
6
1. Troubleshooting
When in Trouble
Fall prevention function in the event of alarms
Outline
Related parameters
Content
When the alarm that must respond to an immediate stop comes on, drop in the
vertical axis, etc. is prevented by keeping the motor energized for the time from when the
brake release output (BRK-OFF) is turned OFF to when the external brakes actually be
gin to work.
Class No.
Title
Function
5
10
Sequence at alarm
To set the state during deceleration and after stopping when
alarm is generated.
Setting to 4 through 7 enables an immediate stop.
6
10
Function expansion
setting
To set the bit concerning drop prevention function.
bit10: Drop prevention function at the time of alarm Position
deviation processing
0: Invalid (retention) 1: Valid (clear)
When the drop prevention function is made enabled, usually
set to 1.
Note: The lest significant bit is designated as bit0.
6
51
Immediate stop
completion wait time
When alarm that must respond to an immediate stop is
generated, after turning OFF the brake release output (BRK-
OFF), set the time to maintain the motor energization. In the
case of zero setting, the drop prevention function is disabled.
• Drop prevention function action when alarm that must respond to an imme-
diate stop
Motor stops
(at 30 r/min or lower)
Motor runs
(at 30 r/min or higher)
Motor speed
Deceleration start
Normal
Immediate stop supported alarm
Application of external brake
Immediate stop supported alarm
Application of external brake
Normal
ON
ON
OFF
OFF
ON (normal)
OFF (abnormal)
OFF (abnormal)
ON (normal)
ON (release)
OFF (operation)
OFF (operation)
ON (release)
With/without alarm
(30 r/min or lower)
0.5 to 5 ms
Pr6.51 is set
Pr6.51 is set
0.5 to 5 ms
30 r/min
30 r/min or lower
Servo alarm output
(ALM)
Brake release output
(BRK-OFF)
Motor current
D
i
In the event that the drop prevention function is enabled when alarm is generated, set Pr5.10
“Sequence at alarm” to 4, Pr6.10 “Function expansion setting” bit 10 to “1,” and a value
longer than the time when brake release output (BRK-OFF) is turned OFF and external brake
actually operates to Pr6.51 “Immediate stop end wait time.”
Note
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