Program Optimization
ABB Control - AC 31
Page 6-9
1SBC 260400 R1001-b
06.99
3. Step motor command
The 40 and 50 series central units allow the command of a step motor.
Usage of the NPULSE function block automatically validates the step motor command.
In this case the O62.00 output is used.
NPULSE
VAL
RESET
FREQ
NB
RDY
VAL_P
VALID
FREQUENCY
RESET
NB_PULSES
READY
VALUE
The VAL input of the NPULSE function validates the pulse generation.
The pulse train always starts with a high level signal (+ 24 V d.c. in the case of a transistor
output) with a 50% cyclic ratio (see Figure 6-5).
50%
T
Figure 6-5 : 50 % cyclic ratio
The frequency of the pulse generator lies between 10 Hz and 2.6 kHz.
The frequency is determined in the following manner:
Frequency (Hz) = 1 / (256-FREQUENCY) x 384 )
FREQUENCY=0
Frequency = 10.1 Hz
FREQUENCY=1
Frequency = 10.212 Hz
FREQUENCY=2
Frequency = 10.253 Hz
...
FREQUENCY=10
Frequency = 10.586 Hz
...
FREQUENCY=100 Frequency = 16.693 Hz
...
FREQUENCY=254 Frequency = 1.302 kHz
FREQUENCY=255 Frequency = 2.604 kHz
The number of pulses is between 0 and 32767.
The number of pulses already generated may be visualized. The error of the value currently
being executed is
±
1.
Summary of Contents for AC 31
Page 1: ...Technical Manual Advant Controller 31 40 50 Series 1SBC 260400 R 1001 b ...
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Page 45: ...Technical specifications Page 3 2 ABB Control AC 31 1SBC 260400 R1001 b 06 99 ...
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Page 85: ...Installation Page 4 2 ABB Control AC 31 1SBC 260400 R1001 b 06 99 ...
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Page 130: ...Programming ABB Control AC 31 Page 5 21 1SBC 260400 R1001 b 06 99 ...
Page 182: ...Communication ABB Control AC 31 Page 7 11 1SBC 260400 R1001 b 06 99 ...
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Page 218: ...AC 31 technical documentation ABB Control AC 31 Index Page 1 1SBC 260400 R1001 b 06 99 Index ...