Reference Point Approach Examples - KEB COMBIVERT F4-F Applications Manual

Functional Description
Reference point mode
(Pc.10)
6.11.16 Reference
Point
Approach
Examples
Fig. 6.11.15 Reference point approach example 1
1: Original position
2: Position after reference point approach
2
X2.4
A: Starting reference point approach
B: Brought in position at reference switch
C: Reference switch cleared
D: Reference marking of encoder reached
Chapter Section Page
6 11 12
This parameter defines how the reference point approach is started or stopped.
• Reference point approach by Pd.1 or digital input (Pc.10 =0, 2, 4)
• Reference point approach with the first „Start positioning" - command
(Pc.10 =1, 3 or 5) after restart of the inverter (power on or changing of Pc.0).
The difference exists in the behaviour of the drive after reaching the reference point:
Pc.10 Function
0 and 1 After reaching the reference point the drive runs to the reference marking of the
encoder. If the reference marking was not yet approached (starting reference
point approach shortly before reference point switch) then the drive continues to
run to the limit switch, reverses and starts a new approach of the reference point.
2 and 3 Drive stops after reaching the reference point.
4 and 5 Like value „0", but the error E.EnC is triggered if no reference marking signal
exists (e.g. track N not connected)
One limit switch serves at the same time as reference point switch; reference point run with
approach of reference marking of encoder.
• Terminal X2.3 = limit switch right (di.11 = 16)
• Terminal X2.4 = limit switch left + reference point switch (di.12 = 21)
• Reference speed -100 min
• Starting of reference point approach with X2.7 (di.5 = 10) or by bus / PC with
parameter Pd.1 = 2 (Pc.10 = 0)
0,25 x Pc.14
v
REF
1
X2.3
Name: Basis
Date
KEB COMBIVERT F4-F
17.06.99
-1
with counter-clockwise rotation (Pc.14 = -100)
+v
REF
A
Pc.14
Pc.14
-v
REF
X2.4
1
0
Positioning Module
B C D
© KEB Antriebstechnik, 1999
All Rights reserved
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