Instruction manual

EFKA AB221A/AB321A + AB222A/AB322A (BA)
42
Connection of a sensor (N.C. function) e. g. light barrier or proximity switch to socket B18/7.
The following settings are possible using parameter 270:
270 = 0 - The positions can be generated with the help of the transmitter incorporated in the motor and can be
set by means of parameter 171.
270 = 1 - Setting the sensor to position 2.
- Position 1 is set according to the angular degree setting by means of parameter 271.
- Start measuring from trailing edge position 2.
- 0V at input B18/7 (inside of the window)
- +5V at input B18/7 (outside of the window)
270 = 2 - Setting the sensor to position 2.
- Position 1 is set according to the angular degree setting by means of parameter 271.
- Start measuring from leading edge position 2.
- Input and output level as with setting “1“
270 = 3 - Setting the sensor to position 1.
- Position 2 is set according to the angular degree setting by means of parameter 271.
- Start measuring from trailing edge position 1.
- Input and output level as with setting “1“
270 = 4 - Setting the sensor to position 1.
- Position 2 is set according to the angular degree setting by means of parameter 271.
- Start measuring from leading edge position 1.
- Input and output level as with setting “1“
270 = 5 - There is no position sensor. The drive stops unpositioned. The thread trimmer is suppressed.
270 = 6 - The positions are determined by preset values. The reference position must be correctly set for this
purpose. In machines with position sensors incorporated in the handwheel the reference position is
determined by mechanical adjustment. In all other cases the reference position must be set (see
chapter “Setting the Reference Position”) in order for the angles preset by machine select for
positions 1 and 2 to be correct. If necessary, the preset values can be adapted as described in
chapters “Setting the Positions”.
= 0V
OUT
OUT
OUT
OUT
ST2
IN
POS1
POS2
ST2/21
POS1
ST2/20
POS2
ST2/21
ST2/20
POS2
ST2/21
POS1
ST2/20
ST2/20
POS1
POS
B18/7
POS2
ST2/21
SEN
= high
0256/ SEN- 2
Pa 271
Pa 271
Pa 271
Pa 271
360°
270 = 1270 = 3270 = 4 270 = 2
+5V
0V
OUT (position window) = npn transistor (emitter to 0V) is conductive. The width of position window cannot be adjusted.
8.9.1 Setting the Reference Position (Parameter 270 = 0 or 6)
The angular positions necessary on the machine e.g. “needle down position“ or “thread lever up position“ are stored in the
control. A reference position is needed in order to establish a relationship between position transmitter information and
actual mechanical position.
The reference position must be set:
 for initial operation
 after replacing the motor
 after replacing the microprocessor