Configuration 381
1. SLS request is activated (SLSx.11 SLS1 input A = DI X113:2 & X114:2). SLS time
delay monitoring is started (SLSx.04 SLS time delay = 2000 ms). Deceleration to
SLS limit speed is started (23.13 Deceleration time 1).
2. Modulation is lost. Motor starts to coast to a stop. SLS time monitoring limit is kept
active also when modulation is lost (SLSx.04 SLS time delay = 2000 ms). Modoff
delay time starts to run (SLSx.06 SLS ramp modoff delay time = 300 ms).
3. Modulation of the drive returns before the SLS ramp modoff delay time has
elapsed (SLSx.06 SLS ramp modoff delay time = 300 ms). Drive continues to
decelerate according to drive parameter in step 2.
4. SLS ramp modoff delay time limit (SLSx.06 SLS ramp modoff delay time = 300
ms).
5. The speed of the drive reaches the SLS speed limit (200.23 SLS1 limit positive =
1200 rpm). SLS monitoring is activated and SLS indication goes on (SLSx.15
SLS1 output A = DO X114:7).
6. The SLSx.04 time monitoring limit. SLS indication is activated at the latest.
Time monitoring is kept active also when modulation is lost during SLS deceleration
ramp and SLSx.06 SLS ramp modoff delay time is set shorter than SLSx.04 SLS time
delay. FSO indicates SLS hit and STO is activated when SLSx.06 has elapsed. Drive
restart is possible until SLSx.06 has elapsed.
Example 4
: The figure below shows an example of the SLS function with time
monitoring when "Monitoring and modoff delay time disabled" (parameter SLSx.05) is
selected:
• Basic parametrization of the SLS function made according to chapter Configuring
SLS on page 362.
• Monitoring and modoff delay time are disabled when drive modulation is lost
(SLSx.05 SLS ramp modoff reaction = Monitoring and modoff delay time disabled)
Relevant parameters for this configuration:
• Deceleration time (drive parameter 23.13 Deceleration time 1)
• SLS activation delay: 2000 ms (SLSx.04 SLS time delay = 2000 ms)
• STO.14 Time to zero speed with STO and modoff: 2500 ms.
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