Siemens Synco 200 - 13 Appendix; 13.1 Abbreviations Used

13 Appendix
13.1 Abbreviations used
To facilitate reading, the most common abbreviations are listed below in
alphabetical order.
Abbreviation Meaning
Heating
Cooling
Δw Setpoint shift
EA Extract air
AC Alternating current
AI Analog input
AO Analog output
OA Outside air
CMP Setpoint compensation
DC Direct current
DI Digital input
DO Digital output
DX Direct expansion cooling
EHA Exhaust air
I I-control
LCD Liquid crystal display
AHC Air heating coil
ACC Air cooling coil
MECH Maximum economy changeover (MECH)
P P-control
PI PI control
Q Load output
SpTSu Supply air temperature setpoint
SpTSuH Supply air temperature setpoint heating
SpTSuC Supply air temperature setpoint cooling
t Time
TA, TOa Outside temperature (OT)
Text Extract air temperature
TFrst Frost temperature
Tn Integral action time
TR Room or extract air temperature
t
RL
Return temperature
Tsu Supply air temperature
TW Water temperature
w Setpoint
x Actual value
X
dz
Dead zone
Xp P-band
Y, Yctl Controller output
SA Supply air
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Appendix 29.08.2008