Lenze i750 - Ramp Monitoring

Ramp monitoring
In addion, the deceler
aon ramp can be parameterised and monitored for the stop funcons
SS1 and SS2. If the parameterised ramp is not exceeded, it is then switched to the
parameterised stop funcon STO or SOS.
Condion
•
Sa
fe speed evaluaon via the parameterized encoder system.
•
Ramp monitoring is acvated. 0x2894:002
•
The starng value of the ramp and the S-ramp me must be specied.
Funconal descripon
Monitoring the deceler
aon process achieves a higher level of safety.
•
The applic
aon guides the drive to standsll.
•
If the speed exceeds the parameterized deceleraon ramp within the stopping me or
before the tolerance window (n = 0) is reached, an error message is triggered and an error
stop is iniated.
Safe ramp monitoring for SS1-r and SS2-r
n
0
STO
SS1
t
STO
❶
❹
❸
❷
C
n
t
0
STO SOS
SS2
❶
❹
❸
❷
D
①
0x2894:001 SS1, SS2: Stopping me
②
0x287B:001 Speed monitoring: Tolerance window (n=0)
③
0x2894:003 SS1, SS2: S-ramp me
④
0x2894:005 SS1, SS2: Start o
set ramp
The parameterized monitoring ramp considers the parameters of the
deceler
aon ramp in the applicaon.
0...100 % of the actual speed are added to the actual speed as start o
set. The
sum is used as constant starng value.
Alternave: An absolute value can be parameterized as start oset. 0x2894:006.
The following parameter determines whether the relave or the absolute oset
value is to be used. 0x2894:004
In the Lenze seng of the start oset, the tolerance window (n=0) is considered
as the oset.0x2894:005
The monitoring ramp starts aer an in
ternal deceleraon me has elapsed. The
internal deceleraon me depends on “SS1, SS2”: smoothing me” and “SS1,
SS2”: stopping me”.
Acvaon
If the stop funcons SS1/SS2 ar
e requested, a monitoring ramp is calculated and placed over
the current speed characterisc.
Normal behavior
While the stopping me elapses or before the tolerance window (n = 0) is reached, the
parameterized speed ramp is not exceeded.
If the stopping me has elapsed and the parameterized speed ramp is not exceeded, the
parameterized stop funcon STO or SOS is triggered.
Funconal sa
fety
Safety funcons
Ramp monitoring
125