Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 137)

Rockwell Automation Publication 750-RM001F-EN-P - February 2012 137
Configuration Examples Chapter 11
Example 1: Limited Speed Group Settings
Figure 50 - Limited Speed Group Parameters
Follow these steps to configure the Safe Limited Speed operation.
1. From the Limited Speed group, choose the P52 [Lim Speed Input]
parameter.
The default value is 0 (Disabled), for applications without Safe Limited
Speed control.
2. Set the P52 [Lim Speed Input] parameter value to 1 for 2NC (dual-
channel equivalent) operation.
In this example application, the Safe Limited Speed input (SLS_In)
monitors a switch with two normally-closed (2NC) contacts. If the NC
contacts are open and speed exceeds the configured Safe Limited Speed,
the safety option initiates the configured Safe Stop Type.
When the safety option is actively monitoring Safe Limited Speed and the
machine’s speed is at or below the configured Safe Speed Limit, the gate
interlock is released and the door can be opened.
3. Choose the P55 [Safe Speed Limit] parameter.
The default value is 0 rpm or mm/s. The valid range is from 0…6553.5.
4. Type the maximum allowable rpm value for safe (reduced) velocity.
The speed is calculated in rpm, based on the Fbk 1 Units parameter setting
(0 = Rotary feedback) entered previously.
5. Go to the next section to set the parameters that configure Door Control
operation.
Port 04: Param File-Group
FILE: Parameter Groups
Lim Speed Input
ESC
AUTO Not Enabled
0.000 Hz
F
GROUP: Limited Speed
LimSpd Mon Delay
Enable SW Input
HIM Screen Software Screen