Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Appendix 03.10.2011
31 Appendix
31.1 Abbreviations
Below is a list of the most common and possible hard-to-understand abbreviations
in alphabetical order.
Heating
Cooling
w Setpoint shift
w
S
Summer compensation delta
w
W
Winter compensation delta
AC Alternating current
AI Analog input
AO Analog output
DC Direct current
DI Digital input
DO Digital output
DX Direct expansion cooling
EIB European Installation Bus (to be replaced by KNX)
E
S
Summer compensation end
E
W
Winter compensation end
RFL Risk of frost limit
F
S
Summer compensation start
F
W
Winter compensation start
I I-response
KNX KNX bus connection (for operating and process information)
KNX LTE mode New communication standard used by Synco and RXB
KNX S-mode Same as with EIB to date
LCD Liquid crystal display
LED Light emitting diode
LH Heating coil
LC Cooling coil
MECH Maximum Economy Changeover (MECH) of air dampers
HMI Human machine interface
P P mode
PI PI mode
SI Switching interval
SD Switching differential
SpC Cooling setpoint
SpCCmf Comfort cooling setpoint
SpCEco Economy cooling setpoint
SpCLim Setpoint cooling limitation
SpCPcmf Setpoint cooling precomfort
SpH Heating setpoint
SpHCmf Comfort heating setpoint
SpHEco Economy heating setpoint
SpHLim Setpoint heating limitation
SpHPcmf Setpoint heating precomfort
SpSu Supply air temperature setpoint
t Time
OT Outside temperature
TiCst Rundown time