Hydraulics-Dependent Inputs And Outputs Of Function Block "Boiler Sequence Manager - Siemens Synco 700 Series Basic Documentation

Main flow sensor (TMnFl)
Main return sensor
(TMnRt)
MBRT return sensor
(TRtMx)
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3.4.1 Hydraulics-dependent inputs and outputs of function
block "Boiler sequence manager"
TFg
TFg
T
TBo
T
T
BuMnSt
BuMdltUp
BuSt1
BuMdltDn
BuSt2
TRtBo
TRtBo
T
BoPu_B
BoPu_A
VlvShOff
VlvRtMx
The sensors and actuating devices in the highlighted part belong to function block
"Boiler sequence manager".
The relevant plant components are activated by making an assignment to an input or
output terminal.
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Inputs
Operating line
Main flow sensor
Main return sensor
Consumer return sensor
MBRT return sensor
* Here, the free inputs are available for selection
** These sensors are automatically configured when selecting the plant type (exception: Basic type K)
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Outputs
Operating line
Main pump
Main pump B
Maint boiler return temp 3-pos
Maint boiler return temp mod
* Here, the free inputs are available for selection
The main flow temperature is the main controlled variable of the boiler sequence and
must always be available with the boiler master (for more detailed information, refer to
section 3.5 "Several boiler sequence controllers RMK770").
If there is no main flow temperature sensor, the following configuration is used to adopt
the measured value inside the controller from the boiler sensor of the current lead boiler:
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Inputs > Main
flow sensor: autonomous
This variant can only be used with 2-boiler plant.
The main return temperature sensor is recommended for plant with pressureless
headers.
The MBRT return temperature sensor is required for minimum limitation of the return
temperature in connection with a common mixing valve (MnVlvRtMx). For this type of
application, the TMnRt sensor cannot be used.
When there is no mixing valve for the common maintained boiler return temperature,
the sensor for minimum limitation of the return temperature with action on the consum-
ers can be used.
The sensor can also be used for display purposes.
Boiler sequence controller RMK770
3 Commissioning
Boiler sequence management
MnPu_A
TBo
T
MnPu_B
T
BoPu
TRtMx
TRtMn
T
T
MnVlvRtMx
Range
RMK770..., RMZ7...*
Range
RMK770..., RMZ7...*
TFlPrCtr
PrCtrVlvMx
TPu_A
T
TPu_B
T
T
TRtPrCtr
TMnFl
T
TRtCo
T
Name
TMnFl**
TMnRt**
TRtCo
TRtMx
Name
MnPu_A
MnPu_B
MnVlvRtMx
MnVlvRtMx
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CE1P3132en
23.04.2009