5
05.01
5.5 Induction motor control with analog setpoint interface 6SN1122–0BA1_–0AA_
5-120
Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
5.5.2 Select relay functions/signals
The select relay terminals A11 to A61 (max. 6) can be freely programmed. A
control parameter is assigned to every select relay, in which the code number of
the selected function is entered.
Table 5-14 Select relay functions/signals
Select relay Function
n
act
=n
set
(ramp–up completed)
The relay pulls–in, if the ramp–up sequence has been completed after a setpoint step.
The signal is not withdrawn as a result of speed fluctuations due to load surges.
n
act
=n
set
(actual) The relay pulls–in, if the actual value lies within a tolerance bandwidth of the setpoint.
Speed fluctuations due to load surges can cause the signal to withdrawn.
|M
d
| < M
dx
The relay pulls–in, if the actual torque falls–below the threshold which has been para-
meterized (this becomes active for ”ramp–up completed” after a time which can be
parameterized).
|n
act
| < n
min
The relay pulls–in, if the speed actual value falls below the threshold which can be para-
meterized.
|n
act
| < n
x
The relay pulls–in, if the speed actual value falls below the threshold which can be para-
meterized.
I
2
t alarm The relay drops out when the parameterized I
2
t limit of the motor is exceeded.
Motor overtemperature
alarm
The relay drops out for an overtemperature condition. If the temperature continues to
increase, an
additional fault message is output and the drive pulses are canceled after a para-
meterizable time.
Heatsink overtempera-
ture, alarm
The relay drops out, if the main heatsink temperature switch of the power module
responds. After 20 s the drive shuts down and a fault signal is output.
Variable relay function
(max. 2 terminals)
Any control program variable can be monitored using this function.
Motor 1/2/3/4 active The relay pulls–in, if motor 1/2/3/4 is active.
5 Control Modules
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