Suggested Load Control Setup - Siemens LMV5 Series Technical Instructions
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Technical Instructions
Document No. LV5‐1000
Suggested Load Control Setup
After the Ratio Control Curve has been commissioned, the load controller should be set up. The load
controller can be run in internal load control modes (uses PID inside LMV5) or external load control
modes (uses a remote PID control separate from the LMV5). The table below outlines the different load
control modes available. Most LMV5s operate with the internal load controller.
Label
External load control, firing rate from
ExtLC X5‐03
Internal load control, setpoint set
IntLC
Internal load control, setpoint from
IntLC Bus
Internal load control, setpoint from
IntLC X62
analog signal on terminal X62
External load control, firing rate from
ExtLC X62
analog signal on terminal X62
External load control, firing rate from
ExtLC Bus
Note: Bump‐less transfer (LMV5 will not cycle off) will occur from "IntLC" to any external load control
mode. Bump‐less transfer will also occur from any external load control mode to "IntLC" provided that
the pressure or temperature is not above the cycle‐off limit (SD_ModOff).
Figure 4‐7: LMV51.1 and LMV52 Load Controller Modes
Section 4
Description
3‐position input
External load control,
staged oil
locally on LMV5
Modbus command
Modbus command
Page 22
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LMV5
Setpoint
N/A (firing rate via
3‐position input or
staged input)
W1 / W2
W3
(Modbus)
Remote setpoint
N/A (firing rate via
X62)
N/A (firing rate via
Modbus)
LMV Series
Upon X62.1 ‐
X62.2 Closure
Change to
"IntLC", setpoint
W1
Remain in
"IntLC", change
to setpoint W2
Change to
"IntLC", setpoint
W1
SCC Inc.
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