11/28/2017 4:37 PM | |
Posts: 23 Rating: (0) |
[snip] edit for one more questions I opened from sample projects example zEn01_13_STEP7_PID-Temp , And here I can not decide which from 5 examples is best to use , continuous controller or pulse control . Can you suggest what sample can use , continuous controler / pulse control OB35,OB1 / pulse control OB35 , OB32 / PULSE CONTROLLE / or step controll . I think it's good to use OB35, OB1 control pulses or ob35 ob32 control pulses , but need an expert advice . thanks
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Last edited by: mugurelgi5 at: 11/28/2017 5:52:19 PMLast edited by: Jen_Moderator at: 11/29/2017 10:55:53 AMNew subject after splitting. Division of questions into separate topics. |
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11/28/2017 7:20 PM | |
Joined: 9/27/2006 Last visit: 9/18/2024 Posts: 12282 Rating: (2684)
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Hello mugurelgi5: These extracts from the FB 58 TCONT_CP manual should help you out:
https://support.industry.siemens.com/cs/ww/en/view/18652438 Pulse Generator - PULSEGEN (PULSE_ON) The PULSEGEN function converts the analog manipulated variable value LmnN to a train of pulses with the period PER_TM using pulse duration modulation(Note from D.C. PWM). PULSEGEN is activated with PULSE_ON=TRUE and is processed in the CYCLE_P cycle. - FB TCONT_CP must be called at constant intervals. To achieve this, use a cyclic interrupt OB (for example OB35 for an S7-300). So you need to open a sample with the pulse generator active if you want ot control a ssr with PWM signals, and you should look at a cyclic OB (OB 35 is available on all S7 CPUs) and use it for a base for your project. Hope this helps, Daniel Chartier |
Last edited by: Jen_Moderator at: 11/29/2017 10:58:04 AMInserted right link. |
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