Functions
8.9 Application-specific functions
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD
241
Restrictions and general constraints for blocking protection depending on the motor type and
control mode
The following preconditions must be satisfied in order that the blockage monitoring is active
for pumps and fans:
● The following applies for application class "Standard Drive Control" (p0096 = 1) or
"Expert" (p0096 = 0) and U/f control (p1300 < 10):
Speed actual value > p2182 and > 10 % rated speed. A torque actual value r0080 is only
calculated in this range.
When the Imax control is active (when reaching the current limit) the blocking protection
intervenes according to the description in No-load monitoring, blocking protection, stall
protection (Page 236)
● For vector control (p1300 = 20) or application class “Dynamic Drive Control” (p0096 = 2),
the following always applies:
– Speed setpoint > p1755 switchover speed, motor model
– Speed actual value > p2182 speed threshold 1
In addition, the following applies:
– for induction motors (operated with the vector control)
p1750.6 = 1 (when the motor is blocked, the closed-loop control does not change into
the open-loop controlled mode) or p2192 < 1 s
– for synchronous and reluctance motors (operated with vector control)
- p2182 > p1755 switchover speed, motor model
- With this method, a complete blockage is not detected
Load monitoring blocking monitoring threshold, upper
p2168
Load monitoring blocking monitoring torque threshold
p2181
Response when evaluating the load monitoring. Setting options, see Load monitor-
Load monitoring speed threshold 1
Load monitoring speed threshold 2
Load monitoring speed threshold 3
Load monitoring torque threshold 1, lower
Load monitoring torque threshold 2, lower
Load monitoring torque threshold 3, lower
Load monitoring torque threshold, no load
Load monitoring delay time
p2193 = 3
Load monitoring configuration
see Load monitoring (Page 237)
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