5.10 Overtravel and Related Settings
5.10.4 Overtravel Warnings
5-29
5
Basic Functions That Requir
e Setting befor
e Operation
Set the deceleration rate when decelerating to a stop in PnB2B.
*
If you set PnB54 to 1 (Enable Expansion Mode), the range will be 1 to 199,999,999. Refer to the following section
for details.
12.4 Speed/Position Expansion Function Setting
5.10.4
Overtravel Warnings
You can set the system to detect an A.9A0 warning (Overtravel) if overtravel occurs while the
servo is ON. This allows the SERVOPACK to notify the host controller with a warning even
when the overtravel signal is input only momentarily. An alarm occurs only if overtravel occurs
while the servo is ON. An overtravel warning will not be detected when the servo is OFF, even if
overtravel occurs.
The following parameter is set for this function.
A timing chart for warning detection is provided below.
PnB2B
Deceleration
Setting Range
Setting Unit
Default Setting
When Enabled
1 to 99999999
*
1000
(Reference units/min)
/ms
1000
Immediately
If the servo turns OFF due to overtravel, the servo will not turn ON even if the overtravel is
released. To turn ON the servo, turn the /S-ON signal OFF and then ON or send the SVON serial
command. If parameter PnB0E is set to 0002h to keep the /S-ON signal always ON, turn the
power supply OFF and then ON again.
Important
1. The occurrence of an A.9A0 warning will not stop the motor or have any affect on host control-
ler motion operations. The next step (e.g., the next motion or command) can be executed
even if an overtravel warning exists.
However, depending on the processing specifications and programming for warnings in the
host controller, operation may be affected when an overtravel warning occurs (e.g., motion
may stop or not stop). Confirm the specifications and programming in the host controller.
2. When overtravel occurs, the SERVOPACK will perform stop processing for overtravel. There-
fore, when an A.9A0 warning occurs, the Servomotor may not reach the target position speci-
fied by the host controller. Check the feedback position to make sure that the axis is stopped
at a safe position.
Parameter
Meaning
When Enabled
Classification
Pn00D
n.0
(default setting)
Do not detect overtravel warnings.
Immediately Setup
n.1
Detect overtravel warnings.
Important
Servo ON/OFF status
OFF
ON
Overtravel signal
Disabled Enabled
Disabled
Enabled
Disabled
Normal status
Warning status for 1 s
Normal status
The warning is automatically cleared.
(P-OT or N-OT signal)
Overtravel warning (A.9A0)
A warning is not detected
because the servo is OFF.