Programming manual SCU-series
HB-37500-820-10-12F-EN SCU Programming manual
Page 198 of 252
Status: 19.03.2021
Tolerance value of current speed.
If the current speed is greater than the current limit curve + tolerance value, energy supply is
disconnected.
Max. acceleration
Determines the increase of the stop curve.
S- slip time
The slip time indicates the period, in which the curve’s form is sinoidal.
The period before and after
the acceleration a
max
.
Reset
Select Reset.
Input (example):
At a production machine, at certain position of the main input axis access to the work zone shall be
guarateed for manual input or for settings. In this position, the drive remains active, and is
monitored only for a standstill. The limits of the work zone are variable and shall be monitored
electronically in a safety-relevant mode instead of being monitored by a mechanical safety limit
switch. The movement, that shall be monitored electronically, is a linear movement. An absolute
encoder is connected to this main drive axis of the linear length measuring system. The drive
functions with an electric motor with an integrated motor feedback system and an in termediate
transmission.
1. Selection of the stop category
To keep machine downtime and restarts as short as possible, the stop category must be used
according to DIN 60604-1 (kontrollierter Stopp mit nachfolgend aktiv gesteuertem Antrieb auf V =
0) => selection of stop category 2
2. Type of speed selection
The drive regulator / the position regulator uses a ramp limiter (shock limiter) for acceleration with
the resulting S-slip to minimise deviations and process. => selection of S-slip.
3. Selection of the limit value
For monitoring, the most unfavourable latency from the occurence of the emergency-stop to the
start of the braking process must be entered. The braking process must be carried out with the
standard control. The sequency time of the programme of the standard control causes latency =
cycle duration * 2 = 50 ms
The other limit values are taken from the setting of the plant.
Maximum infeed speed = 300 mm/s²
Maximum acceleration = 1000 mm/s²
Maximum acceleration change = 3000 mm/s³