YASKAWA SGDV-OCA05A

6.6 Software Limits
6.6.1 Setting to Enable/Disable Software Limits
6-16
6.6 Software Limits
You can set limits in the software for machine movement that do not use the overtravel signals
(CCW-OT and CW-OT). If a software limit is exceeded, an emergency stop will be executed in
the same way as it is for overtravel.
You must make the following settings to use the software limits.
• You must enable the software limit function.
• You must set the software limits.
6.6.1 Setting to Enable/Disable Software Limits
You can use PnB18 (Software Limit Action Selection) to enable and disable the software limit
function.
The software limits are enabled at the following times:
• When an absolute encoder is used
• After completing an origin return when an incremental encoder is used
In all other cases, the software limit function will not operate even if a software limit is
exceeded.
6.6.2 Setting the Software Limit Action
You can use PnB18 (Software Limit Action Selection) to set the stopping method when a soft-
ware limit is exceeded.
When a software limit is reached, the target position is automatically replaced with the current
position.
6.6.3 Setting the Software Limits
Software limits are set in both the forward and reverse directions.
The reverse software limit must be less than the forward software limit to set a limit in each
direction.
Parameter Meaning
PnB18
b.
   0 The software limits are disabled. (Default setting)
b.   1 The software limits are enabled.
Parameter Meaning
PnB18
b.
   0 Smooth stop (default setting)
b.   1 Hard stop
PnB16
Forward Software Limit
Setting Range Setting Unit Default Setting When Enabled
-2,147,483,647 to
2,147,483,647
1 reference unit 2,147,483,647 Immediately
PnB17
Reverse Software Limit
Setting Range Setting Unit Default Setting When Enabled
-2,147,483,647 to
2,147,483,647
1 reference unit -2,147,483,647 Immediately