Siemens SIRIUS 3RW55 - Page 123

Functions
7.7 Condition Monitoring
SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002
123
Parameters
Parameters
Description
Switching frequency monitoring
Deactivated
(factory setting)
The switching frequency monitoring is deactivated.
Mode 1 (ON-ON)
The switching frequency monitoring always relates to the start time of the
preceding Motor ON command and the start time of the new Motor ON
command. The switching frequency monitoring time t
1
or t
2
starts as soon
as an effective switch-on command is present.
Mode 2 (OFF-ON)
The switching frequency monitoring always relates to the end time of the
preceding Motor ON command (Motor OFF) and the starting time of the
new Motor ON command. The switching frequency monitoring time t
1
or t
2
starts as soon as no effective switch-on command is present.
Maximum number of starts
This parameter is only relevant in combination with the switching frequency
monitoring time t
2
. If the parameter for the switching frequency monitoring
time t
2
has the value "0" (= deactivated), then this parameter is irrelevant
and its value has no meaning.
If the parameter for the switching frequency monitoring time t
2
has a value
not equal to "0" (= activated), then this parameter defines the maximum
number of starts, until which the switching frequency monitoring time t
2
does not have to be observed. At the latest upon reaching the maximum
number of starts, the switching frequency monitoring time t
2
must be
observed once. If the switching frequency monitoring time t
2
is observed
before reaching the maximum number of starts, then the counter for the
number of starts begins again at "1".
• Factory setting: 2
• Setting range: 2 ... 255
• Increment: 1
Switching frequency monitoring time t
1
The time t
1
must be shorter than the time t
2
.
The parameter value "0" deactivates the switching frequency monitoring
time t
1
.
• Factory setting: 0 s
• Setting range: 0 ... 65 535 s
• Increment: 1 s
Switching frequency monitoring time t
2
The time t
2
must be longer than the time t
1.
The parameter value "0" deactivates the switching frequency monitoring
time t
2
.
• Factory setting: 0 s
• Setting range: 0 ... 65 535 s
• Increment: 1 s
Response to ON-command during active
monit. time
Trip with restart
The trip is automatically acknowledged if no monitoring time is still active.
If an ON command is still pending, the motor is switched on.
Trip without restart
The trip must be acknowledged with the "Reset" function.