function removes the solids stuck to impeller blades and thus reduces the friction
and inertial losses during normal operation.
Production
state
Cleaning cycle 1
Cleaning cycle 2
Speed reference
Time
81.24
81.21
0
81.22
81.23
81.25
81.23
81.22
81.23
81.25
The function can be triggered using:
1. Explicit command trigger - provided by the user through Fieldbus or digital
input.
2. On schedule - repeated regularly based on user timer setting.
The ongoing cleaning operation can be interrupted either manually or automatically
based on actual load supervision.
• Supervision high function can be used to abort currently running cleaning cycle
to avoid motor overheating in case of abnormal load peaks.
• Supervision low function can be used to abort the whole cleaning sequence if
load detected in course of cleaning step is below a reasonable limit. The
reduced load can be interpreted as green light to switch to production state.
The pump impeller cleaning can be improved by performing following starting
routines before every cleaning cycle:
• Kick-start
• Starting speed
• Current pulse-start
• Acceleration assistance
￭
Settings and diagnostics
Parameter group 81 Pump cleaning (page 552).
Events: D200 Cleaning max warning, D100 Cleaning max fault.
52 ESP program features
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