Siemens Synco 700 Series - Several Boiler Sequence Controllers RMK770

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Building Technologies Boiler Sequence Controller RMK770 CE1P3132en
HVAC Products 3 Commissioning 23.04.2009
The digital inputs can accept signals from potential-free contacts for control functions.
Main menu > Commissioning > Extra configuration > Miscellaneous > Input identifier
Operating line Setting
N.X5 Digital
The normal position can be predefined for each digital input.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Inputs > …X…
Operating line Range Factory setting
Normal position Open / Closed Open
G
G
G0
X...
G0
N
3140A05
AC 24 V
M
F...
Δ
p
X... M
F...
Digital signals cannot be monitored.
3.5 Several boiler sequence controllers RMK770
If the number of outputs do not suffice although all extension modules are fully used, or
if the number of available function blocks do not suffice, the multiboiler plant must be
assigned to several RMK770 controllers. But there may also be other reasons to have
the plant controlled by several RMK770.
In that case, one of the RMK770 controllers provides the boiler master function. And
function block “Boiler sequence manager” is activated only in that RMK770. This func-
tion block controls the boilers of the other RMK770 via bus.
The boiler master is defined by configuring the main flow temperature sensor.
With the other RMK770 controllers, that sensor must not be configured.
Configuration with the second RMK770 is made with setting “Basic type K“. In the extra
configuration, the sensors and aggregates must be assigned to the relevant boiler. In
the illustration below, this is boiler no. 3.
T
T
T
T
3132S43
CE-
Q11
D1X8
Q24
Q23
G0M
M
Y1G1
G
G1
X6
M
X5
MMM
X3X2
M
X4
M
Q33
Q34
Q41
Q44
Q53
Q54
Q63
Q64
Q14
CE+ X1
G1
Q12
Q42
Q73
Q74
Y2 G0
X7
D2MM
G1
G0
G1
RMK770
T
RMZ78…
1
2
3
Digital inputs
Configuration of input
Normal position
Setting
Fault handling