Rockwell Automation SMC-Flex, User Manual

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1-14 Product Overview
Stall Protection and Jam Detection
The SMC-Flex controller provides both stall protection and jam
detection for enhanced motor and system protection.
• Stall protection is user-adjustable from 0.0…10.0 seconds (in
addition to the ramp time programmed).
Figure 1.15 Stall Protection
• An alarm (pre-fault) indication level can be programmed to
indicate the unit is getting close to faulting. The alarm
modification information is displayed through the LCD, HIM,
Communication (if applicable) and alarm contact closing.
• Jam detection allows the user to determine the jam level (up to
1000% of the motor’s FLC rating) and the delay time (up to
99.0 seconds) for application flexibility.
Figure 1.16 Jam Detection
➀➁
➀
Jam detection is disabled during slow speed and braking operation.
➁
Unit will self-protect in a jam condition.
Stall
600%
Percent
Full
Load
Current
Time (seconds)
Programmed Start Time
100%
Running Jam
Percent
Full
Load
Current
Time (seconds)
User Programmed Trip Level