Commissioning (software)
5.8 Commissioning the Fail-safe Functions
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
5-73
Safely-limited Speed
Parameter Description Unit Default Min. Max.
P9690 SI setpoint for SLS
Speed setpoint that is used when the safely limited speed (SLS) is
selected. Depending on the setting in P9692/P9892 the frequency of
P9690/P9890 may also serve as a speed threshold instead of a
setpoint (see P9692).
Note:
For applications with changing loads, an increase of P9680/P9880 or
P9691/P9891 is recommended. If the "safely limited speed" (SLS) is
selected while the actual speed is below the setpoint value, Bit 04 and
Bit 05 will be set simultanously in r9772.
Hz 10.0 2.0 300.0
P9890 SI setpoint for SLS
Refer to P9690.
kHz 0.010 0.002 0.300
P9691 SI tolerance for SLS
Upper tolerance margin for the SLS. If the actual frequency at initiation
of the safely limited speed lies below the value of P9691/P9891 and
later on exceeds that value an latched safe torque off (LSTO) is
generated. The tolerance defined by the difference P9691 to P9690
(or P9891 to P9890) is also used for the monitoring ramp when the
SBR is active. For applications with changing loads it is recommended
to increase P9691/P9891.
Note:
The value in P9691 needs to be larger than the value in P9690. This
condition is checked when leaving the safety commissioning.
Hz 13.0 5.0 302.0
P9891 SI tolerance for SLS
Refer to P9691.
kHz 0.013 0.005 0.302
P9692 SI response to selecting SLS
Response if, after the initiation of safely limited speed (SLS), the
speed is higher than the limit value:
• 0:
Activation of the speed monitoring and disabling the set value
channel. If the actual speed at initiation of SLS exceeds the
parameterized speed limit the latched safe torque off is initiated.
• 1
Braking to the set speed with safe braking ramp, then activation of
the monitoring function and disabling the set value channel.
• 2
The monitoring is activated at once. If the actual speed at initiation
of SLS exceeds the parameterized speed limit the latched safe
torque off is initiated. The set value channel is not disabled.
- 1 0 2
P9892 SI response to selecting SLS
Refer to P9692.
- 1 0 2
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