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INSTALLATION INSTRUCTIONS NIPPER - JULY 2020
31
Protective field selection by the safe CPU
When stationary, the first table is automatically active. If the set speed is “close” to the maximum speed, the
following table item is changed. The new protective field is activated and the new maximum speed is regulated.
When the speed drops again, the reverse process will be carried out.
This consists of the switching time and the time-out of the transmission. For this reason, the protective field must
be switched before reaching the associated maximum speed. The actual switching speed
𝑣
𝑠𝑐ℎ𝑎𝑙𝑡
is the result of
the maximum acceleration
[𝑎
𝑚𝑎𝑥
] minus the maximum speed
𝑣
𝑚𝑎𝑥
and the maximum transmission time
[𝑡
𝑚𝑎𝑥
]
.
𝑣
𝑠𝑐ℎ𝑎𝑙𝑡
= 𝑣
𝑚𝑎𝑥
− 𝑎
𝑚𝑎𝑥
∗ 𝑡
𝑚𝑎𝑥
a _ max = 1000 [mm/s^2]
t _ max = 30 [Ms]
Duration:
The response time must be considered in the calculation of the protective fields, which is calculated as follows:
s = Vmax* 200ms