Positioning With Negatively Initialized Overtravel - WAGO -I/O-SYSTEM 750 Manual

2.1.1.9.8.4

Positioning with negatively initialized overtravel

Example 8:
PU = BD
PD = BD
RT = 0
OZ = 0
OT = -V
Fig. 2.1.1-14: Example 8
The negatively initialized overtravel forces the setpoint position to be
approached from below.
The approach position is generated by adding setpoint position (SP) and
overtravel (OT).
Example: SP = 1000, OT = -200
In this example, the actual position is further below the setpoint position than
the absolute value of the overtravel; the setpoint position can be reached
within the first moving cycle.
Example 9:
HP = SP + OT
Fig. 2.1.1-15: Example 9
In example 9, the actual position is above the setpoint position. The drive must
overtravel the setpoint position by the amount of the overtravel value, in order
to approach the setpoint position from below. However, exact positioning is
only possible if the acceleration distance does not exceed the braking distance
and if the absolute value of the overtravel is at least twice as large as the
braking distance. If this is not the case, please see section 2.1.1.9.8.5,
"Positioning with positively initialized overtravel" in order to find out what
must be considered.
WAGO-I/O-SYSTEM 750
I/O-Modules
AD
-
IP
OT
BD
-
AP = HP + PD
OT
AD
-
IP
750-636 [DC Drive Controller]
Function Description
Approach position = 800.
SP
BD
+
HP = SP
OT
BD
+
AP HP = SP
g063617x
PU = BD
PD = BD
AD
RT = 1
OZ = 0
+
OT = -V
IP
g063618x
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