Function Diagrams - Siemens LMV5 Series Basic Documentation

Function diagrams

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Example 1: Reaction thresholds Q2 and Q3 for switching on stages 2 and 3 are not
reached. In that case, stage 1 will already be switched off when threshold
W+SD_Stage3Off is reached (low-fire operation).
SD_Stage1Off
SD_Stage2Off
SD_Stage3Off
W
SD_Stage1On
R=ON
Stage1
Stage 2
Stage 3
Example 2: Reaction thresholds Q2 and Q3 for switching on stages 2 and 3 are
exceeded and the stages will be switched on.
In that case, stage 1 will be switched off when threshold W+
SD_Stage1Off is reached.
SD_Stage1Off
SD_Stage2Off
SD_Stage3Off
W
SD_Stage1On
R=ON
Stage 1
Stage 2
Stage 3
Basic Documentation LMV51...
6 Temperature or pressure controller (internal load controller LC)
Setpoint
Setpoint
Q2
Q3
Actual value
Actual value
7550f10E/0502
7550f09E/0502
Q2
Q3
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CC1P7550en
01.10.2003