Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 147)

Rockwell Automation Publication 750-RM001F-EN-P - February 2012 147
Configuration Examples Chapter 11
Example 2: Limited Speed Group Settings
Figure 57 - 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 P53 [LimSpd Mon Delay] parameter.
The default value is 0 s. The valid range is from 0…6553.5 s.
Type a value to define the desired delay between the SLS_In input ON to
OFF transition and the start of Safe Limited Speed monitoring.
4. Choose the P54 [Enable SW Input] parameter.
The default value is 0 (Not Used) for applications without an enabling
switch.
5. Set the P54 [Enable SW Input] parameter value to 1 for 2NC (dual-
channel equivalent) operation.
In this example application, the ESM_In input monitors an enabling
switch with two normally-closed (2NC) contacts. As long as the enabling
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