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VIPA System MICRO
X2
Function
7
DO 0.1
8
DO 0.0
9
0 V
10
DC 24V
5.8.3 Proceeding
Hardware configuration
User program
5.8.4 Parametrization
5.8.4.1
Address assignment
Sub module
Input
address
Counter
816
820
824
828
HB400 | CPU | M13-CCF0000 | en | 18-50
Type
LED
green
red
O
O
I
I
PWM and pulse train output use the same hardware configuration. Switching between
these modes is done within the SFB 49. In the Siemens SIMATIC Manager the following
steps should be executed:
1.
Perform a hardware configuration for the CPU.
tion - CPU' page 68
2.
Double-click the counter sub module of the CPU 314C-2 PN/DP.
ð The dialog 'Properties' is opened.
3.
As soon as you select the operating mode for the corresponding channel, a dialog
box with default values for this counter mode is created and shown. For PWM
respectively pulse train output select for the corresponding channel the operating
mode 'Pulse width modulation - PWM' .
4.
Perform the required parameter settings.
5.
Safe your project with 'Station è Safe and compile'.
6.
Transfer your project to your CPU.
n
The SFB 49 should cyclically be called (e.g. OB 1) for controlling the pulse width
modulation.
–
The SFB 49 is used for PWM and pulse train output.
–
The switching between the modes takes place by the presetting of the pulse
number (JOB_ID = 08h/09h). As soon as you specify a pulse number > 0, you
switch to the pulse train mode, otherwise PWM is active.
The SFB is to be called with the corresponding instance DB. Here the parameters of
n
the SFB are stored.
Access
DINT
DINT
DINT
DINT
Description
PWM 1
PWM 0
4M: GND for PWM
LED (red) is on at short circuit respectively overload
4L+: DC 24V power section supply for PWM
Description
reserved
reserved
reserved
reserved
Deployment I/O periphery
Pulse width modulation - PWM > Parametrization
Ä Chap. 4.4 'Hardware configura-
147
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