Temperature Or Pressure Controller (Internal Load Controller Lc); General; Connection Diagram; Operating Modes With The Load Controller - Siemens LMV51 Series Basic Documentation

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6 Temperature or pressure controller (in-
ternal load controller LC)

6.1 General

The internal «load controller» is provided as an option to the LMV51... and is a stan-
dard component of the LMV52...
This is a digital PID controller for the control of temperature or pressure, featuring self-
setting or manual setting of the control parameters.
On fuel changeover, the control characteristics for modulating or multistage burners are
automatically adapted if required.
For operation and parameterization, refer to chapter «AZL5...»

6.2 Connection diagram

Output Input 3
Setpoint or
output
OUTPUT SET POINT
X63
1

6.3 Operating modes with the load controller

For the connection of a load controller, the LMV5... can be operated in different
configurations. In that case, the internal load controller, different external load con-
trollers, or a load controller via a BACS can be used.
To ensure all involved bus users (BU, LC, AZL5...) are correctly configured, the global
parameter «LC_OptgMode» will be defined.
This parameter is set on the AZL5... when selecting the operating mode and is deliv-
ered to all bus users involved. Then, each bus user makes the configurations required
for the relevant operating modes.
Parameter:
LC_OptgMode (ExtLC X5-03/Int LC/Int LC Bus/Int LC X62/Ext LC
X62/Ext LC Bus)
Basic Documentation LMV5...

6 Temperature or pressure controller (internal load controller LC)

LR - connections
Input 2
Actual value
pressure or temp.
ACT. VALUE
X62 X61
1 1
LMV51
Inputs 1 and 4
Actual temp.
I1 = Pt 100
I4 = Pt / Ni 1000
TEMP.
X60
1
Pt100
Pt / Ni 1000
7550a05E
CC1P7550en
13.08.2004