Rockwell Automation 825 Smart Motor Manager User Manual - Manual (Page 68)

3-35 Functions
Publication 825-UM001B-EN-P January 2001
Table 3.S Monitoring Start Time Setting Parameters
➊ –5…60 ° C (23…140 ° F)
➋ If auxiliary relays #2 and #3 are assigned to the communication (refer to page 5-16 ) they cannot be selected
here.
Note: With Star-Delta (Wye-Delta) starting, the total starting time (Star and Delta) is
monitored. If immediate switch off is demanded in the event of stalling, monitoring must be
provided by a zero speed switch (function “stalling during starting”).
Note: If the starting current is below 1.2 FLC, then the “Monitoring the Start Time”
function must be activated. After the set max. starting Time has elapsed, the “High
Overload/Stall” function will become active.
Applications:
• Slip ring motors
• Soft starters
• Motor protection with “non-fail-safe mode”, after a control voltage failure
Warm Start
Function
The motor windings may be heated for a short time above the permissible temperature limit.
This applies particularly to rotor-critical motors. The temperature that is permitted for this
short period is approximately 250
° C and is thus appreciably higher than the continuous
operating temperature of 100…150 ° C. This means that a motor warm from running has a
relatively long permissible starting time. This property of the motor can be used with the
Smart Motor Manager, which is factory-set for one warm start per hour. The tripping time is
then 70% of that from cold. The warm start function is switched off in the factory. As
additional protection for the motor, too many warm starts can be prevented by the “limiting
the number of starts per hour” function.
Function
Factory setting Off
Max. Starting Time ➊
Setting range 1…240 s ± 0.04 s
Factory setting 10 s ± 0.04 s
Setting increments 1 s
Output Relay ➋
Selection (relays) MR, AL, #1…#5
Factory setting MR