3.9
Electronic gear
In this mode, an external signal and a gear ratio combine to determine
the shaft movement. The externally supplied pulses (fig. 3-8) are counted
as A/B encoder signals or pulse/direction signals and multiplied with a
gear ratio (numerator by denominator). These pulses are used as the
reference variable for the stepping motor position.
Available for units:
– with encoder interface
if P00 = 3
The pulse memory is cleared whenever an error occurs or when input
AUTOM changes from 1 to 0.
The electronic gear parameters can be set using on-line command
processing (see chapter 3.8) or via the front panel. The following para-
graphs describe parameter setting via the front panel.
NOTE
The following parameters must have been set (see chapter 3.3.1):
– Operating mode with parameter P00 = 3
– Encoder signal type with parameter P50
– Gear ratios with parameters P51 and P52
1.
Activate the AUTOM input.
NOTE
The motor accelerates using the parameter value P02 if the ramp of the
supplied pulses multiplied with the gear ratio exceeds this value. If the
ramp is less than the parameter value, the motor accelerates precisely
according to the supplied pulses.
2.
If the status display shows “run”, pulses can be supplied via the
encoder interface.
The limit switches and the STOP input are not monitored.
NOTE
Any supplied pulses are ignored while the AUTOM input is inactive. Also,
they are not traced back when the AUTOM input is reactivated.
P51 Gear ratio numerator
P52 Gear ratio denominator
P50 Encoder signal type
Reference variable
Pulse,
direction
or
M
E
Power
controller
P02 Max. acceleration
Gear
ratio
Pulse memory
and
frequency control
A/B signals
Pulse/direction
signals
Encoder
interface
Indexer
Fig. 3-8 Electronic gear
block diagram
Supply
pulses
Operation
3-26
WDP3-01X Ident. no.: 00441109760
