X5 Function Type Description19 0V I 2M: GND for PWM20 DC 24V I 3L+: DC 24V SLIO bus power section supply21 0V I 3M: GND SLIO bus power section supply5.8.3 ProceedingPWM and pulse train output use the same hardware configuration. Switching betweenthese modes is done within the SFB 49. In the Siemens SIMATIC Manager the followingsteps should be executed:1. Perform a hardware configuration for the CPU.Ä Chap. 4.5 ‘Hardware configura-tion - CPU’ page 692. 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 dialogbox with default values for this counter mode is created and shown. For PWMrespectively pulse train output select for the corresponding channel the operatingmode ‘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 widthmodulation.– The SFB 49 is used for PWM and pulse train output.– The switching between the modes takes place by the presetting of the pulsenumber (JOB_ID = 08h/09h). As soon as you specify a pulse number > 0, youswitch to the pulse train mode, otherwise PWM is active.n The SFB is to be called with the corresponding instance DB. Here the parameters ofthe SFB are stored.5.8.4 Parametrization5.8.4.1 Address assignmentSub module InputaddressAccess DescriptionCounter 816 DINT reserved820 DINT reserved824 DINT reserved828 DINT reservedHardware configurationUser programVIPA System SLIODeployment I/O peripheryPulse width modulation - PWM > ParametrizationHB300 | CPU | 013-CCF0R00 | en | 19-30154
