Mode Of Operation With An Autonomous Unit (Without Bus); Mode Of Operation In Interconnected Plants - Siemens RVP360 Basic Documentation

Variant 1
Central impact
of limitation
Variant 2
Local impact
of limitation
56/106
Siemens
Building Technologies
When the integral reaches the value of zero, minimum limitation of the return tem-
perature becomes inactive, in which case the critical locking signal is zero.
If minimum limitation of the return temperature is active, the display shows
Minimum limitation of the return temperature can be deactivated.
Chapter 17.4.5 "Locking signal gain" provides information on who receives the
critical locking signal and how the consumers respond to it.
The minimum limit value is to be set on operating line 101. Setting --- = inactive.
13.3.3 Mode of operation with an autonomous unit (without
bus)
Controller 1
Boiler controller
Without minimum limitation
of the return temperature

13.3.4 Mode of operation in interconnected plants

Controller 1
Plant type no. 5-0
Setting operating
line101 = 50 °C,
return temperature
detector connected.
Controller 1 shuts the
heating circuit mixing
valve
Critical locking signal
Controller 1
Boiler controller
(With no possibility of
minimum limitation of
return temperature)
Return temperature signal
The zone controller with its own return temperature sensor (plant type 4 - x) passes
the return temperature to the other zone controllers in the same segment.
These can thus ensure minimum limitation of the return temperature locally, depend-
ing on the settings made, which means that they generate a critical locking signal
internally. (For response to critical locking signals, refer to chapter 17.4.5 "Locking
signal gain").
Basic Documentation RVP360
13 Function block: Setpoint return temperature limitation
Controller 2
Plant type 4-1
Operating line 101 = 50 °C
Return temperature sensor
connected
Critical locking signal
LPB
Controller 2
Plant type no. 4-0
Setting operating line 101 = - - - , no own
return temperature detector connected
Controller 3
Plant type no. 4-1
Setting operating line 101 = - - - , no own
return temperature detector connected
LPB
Plant type no. 4-0
Setting operating line 101 = 50 °C,
return temperature sensor connected
Plant type no. 4-0
Setting operating line 101 = 40 °C, on own
return temperature sensor connected
Controller 2 generates internally a
critical locking signal which shuts the
heating circuit mixing valve and
deactivates the charging pump
Controller 2 shuts the
heating circuit mixing
valve
Controller 3 shuts the heating
circuit mixing valve and deacti-
vates the d.h.w. charging pump
Controller 2 limits the
Controller 2
return temperature
to 50 °C min.
Controller 3 limits the
return temperature
Controller 3
to 40 °C min.
.
CE1P2546en
2017-07-24