User Manual

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
Configuration error
If the second MECH input does not use the same unit as the first MECH input, only
the first input is considered for changeover. If none or only the second input is
configured, changeover is deactivated.
10.6 Linear/binary step switch (1…3)
123
4
y1 y2
x
QQ Q
QY
y3
LIN / BIN
123
4
y1 y2
x
QQ Q
QY
y3
LIN / BIN
123
4
y1 y2
x
QQ Q
QY
y3
Step
switch 1
Step
switch 2
Step
switch 3
ReleaseRelease
Linear
Binary
Linear
Binary
Linear
Binary
Release
Connect 1+2 Connect 2+3
This function block is used to switch multistage aggregates depending on load or to
switch several aggregates. The step switch can be cascaded to increase the
number of available steps.
The step switch can be configured as:
 Linear step switch
- Switching equal-size steps or aggregates with equal performance.
- Lead/sequential control (Run priority changeover).
or
 Binary step switch
- Switching of binary stepped aggregates. Max 15 steps can be switched per step
switch.
The step switches can be controlled by max three internal sequence controllers
(see section 15.1.1 "Assign aggregates to sequences") with the highest signal
being valid (max. selectio
n).
10.6.1 Activate block
The linear/binary step switch is activated by assigning it to output Qx on Step 1 or
to a modulating output of output Y.
Main menu > Commissioning > Extra configuration> Aggregates > Step switch > Step
switch 1...3 >
Operating line Range
Step 1 ---, N.Q1, N.Q2, ... (free outputs only)
Step 2 ---, N.Q1, N.Q2, ... (free outputs only)
Step 3 ---, N.Q1, N.Q2, ... (free outputs only)
Step 4 ---, N.Q1, N.Q2, ... (free outputs only)
Modulating output ---, N.Y1, N.Y2, ... (free outputs only)
The type (linear, binary) is used to set the step switch properties.
Main menu > Commissioning > Extra configuration> Aggregates > Step switch > Step
switch 1...3 >
Operating line Range Factory setting
Type Linear, Binary Linear
Configuration
Configuration