WAGO-I/O-SYSTEM 750
Function Description
31
750-636/000-x00 DC Drive Controller 24V/5A
Manual
Version 2.1.0
4.7
Prestop
Every drive direction has its own prestop value. The direction-dependent value is
considered during the positioning process to determine the stop or deceleration
position.
If "Optimize_ON" = 1, the prestop is determined at every stop as a function of the
braking distance. When moving to a position while "Optimize_ON" = 1 in the
auto mode, or with gearbox backlash compensation, the new prestop value is
written into the corresponding I/O module's RAM registers and is then available
to the positioning interface as an updated value for the next drive.
If "Optimize_ON" = 0, the prestop value is not written back, but the current value
of the corresponding RAM register is taken into account. In this operating mode,
the higher-level PLC can optimize values in the RAM registers via parameter
channel depending on the application.
4.8
Base Mode
For the following examples, it is presumed that the acceleration and the brake path
have the same distance.
Table 14: Abbreviations Used
IP:
Actual position
BD: Braking Distance RT: Retry
SP: Setpoint position AD: Acceleration
Distance
PU: Prestop Up (RAM
Register)
OT: Overtravel
BM: Base Mode
PD: Prestop Down
(RAM
Register)
AP: Motor turn-off
position
AM: Auto Mode
D:
Distance
HP: Stop position
OZ: Optimize
V:
Value
Example 1
Figure 10: Example 1
0 is used to initialize prestop. The motor turn-off position equals the setpoint
position. The setpoint position is overtraveled by the braking distance.