Operating behavior – Rockwell Automation 937CU-DIFRQ_1 Universal Frequency Converter Installation Instructions User Manual
Page 23
Bul. 937
C Universal Frequency Converter Installation Instructions
Operating Behavior
Either
Max or Min may be selected as operating behavior; either Active or Passive may be selected as
operating mode (See
Limit switch). Range of application:
•Switching direction
MAX, mode of operation Active: Alarm if trip value exceeded,
for example buzzer on
•Switching direction
MAX, mode of operation Passive: Overfill protection, monitoring of excessive RPM,
for example pump/drive off; in case of large hysteresis MIN-MAX mode (on/off )
•Switching direction
MIN, mode of operation Active: Alarm if trip value exceeded,
for example buzzer on
•Switching direction
MIN, mode of operation Passive: Overload protection, monitoring for low speed, for
example pump off if there is no more flow
The exact operating behavior of the UFC is shown in the following figure:
21
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