Siemens Synco 200 - Page 95

9.2.3 Troubleshooting
The effect of sensor failures is as follows:
Impact of sensor errors
Control strategy Room sensor
missing
Supply air sensor
missing
Room and supply
air sensor missing
Room temperature
control
Plant will be shut
down (MAINALM)
No supply air
sensor
No supply air
sensor
Room-supply air
temperature
cascade control
Supply air
temperature control
with room setpoints
Plant will be shut
down
(MAINALM)
Plant will be shut
down (MAINALM)
Supply air
temperature control
No room sensor Plant will be shut
down
(MAINALM)
No room sensor
Room temperature
control with supply
air temperature
limitation
Plant will be shut
down (MAINALM)
Room
temperature
control without
supply air
temperature
limitation
9.2.4 Configuration
Path: … > COMMIS > CONF > X1…X5
Controller 1,
basic type A
Display Name Adjustable values / comments
LABEL Input identifier Activation of room / supply air temperature
sensor.
Adjustable values: ROOM, SAT
Path: … > COMMIS > CONF > CTLOOP 1
Display Name Adjustable values / comments
CAS/CON Casc/const
changeover input
Activation of control strategy changeover.
Adjustable values:
---, X1, X2, … (digital values only).
Meaning of input signal:
0 = room-supply air temperature cascade
control
1 = supply air temperature control (constant)
STRATGY Control strategy Adjustable values:
---, LIM, CAS (factory setting: CAS)
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Controller (CTLOOP x) 29.08.2008