MPT 700
16
3.3 Mode of operation 3 - heating with variable pulse width and
spacing
• In this mode of operation, no fixed pulse widths are defined.
• The pulse width or the pulse spacing changes as a function of the setting.
• Max. pulse frequency = 1 / (min. on time + min. off time)
• The maximum pulse frequency is reached at a setting corresponding to the
value entered for parameter 28 and 29 ('XX' in diagram).
• Even before the unit changes from pulse operation to a continuous pulse, the
minimum off time never falls below the set parameter value.
Pulse diagram:
1. setting 1%
⇒ min. on time / max. off time
2. setting 1%...XX%
⇒ min. on time / off time is reduced
3. setting XX%
⇒ min. on time / min. off time
maximum pulse frequency
4. setting XX%...99%
⇒ min. off time / on time is increased
5. setting 100%
⇒ continuous pulse
XX% ⇒ value in parameter 28 (10...90%)
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