Configuration Parameters -  Secondary Circuit Controller - Cooling Type

Types: VTU/DIN/3T/2xx, CTU/DIN/3T/2xx

Software Release: CSCVT4c1

Configuration Parameters

ref. Neumonic description default range
C1 NOSP Non Occupied setpoint 30 10 to 50C
C2 MAXF maximum Flow setpoint 18 5 to 100C
C3 MINF minimum Flow setpoint 8 1 to 100C
C4 SACT sensor action

0 either

1 average

2 maximum

3 minimum

0 0 to 4
C5 SCAL sensor calibration 0.0 -10.0  to 10.0 C
C6 SPTY Setpoint Type:
for CTU:    
0: Constant temperature setpoint (value set in MAXF)
for VTU: 
1: Setpoint varies linearly based on Maximum Demand Signal from Consumers
2: Setpoint varies linearly based on Average Demand Signal from Consumers
1 0 to 2
C7 INMD

Input Mode use of terminals 'temp a'

  • 0 additional temperature input for max,min,average using SACT
  • 1 External occupation (short = occupied) AND internal occ
  • 2 External occupation OR internal occ
  • 3 External occupation signal only
  • 4 Alarm input
  • 5 Pump Alarm
0 0 to 5
C8 MIND Minimum Demand:
When highest demand from all registered zones is less than this value,controller uses non occupied FRST setpoint
0: controller runs to Occupied setpoint for Occupation period
5 0 to 100%
C9 MNAV minimum value for average demand 0 0 to 100%
C10 MNOC minimum number of occupied zones 0 0 to 200
C11 MNDV minimum driver demand, effects control of Fan or Pump 0 0 to 100%
C12 GAIN Flow Gain:
amount subtracted from the Controller’s setpoint and sent as a CT setpoint to Cool Provider; offsets distribution temperature gains
2 0 to 25C
C13 CPRD stroke time or minimum on time depends on driver type 1 to 240secs/10
C14 CDLY Interlock delay;
0:     Pump starts as valve opens; no delay.
Negative value:  Valve opens before Pump starts.
Positive Value: Pump runs on after valve shuts down.
0 -60.0 to 60.0 minutes
C15 FPRD not used in this application; set to 12 12 1 to 240secs/10
C16 FRPT frost protect mode

0 none

1 valve only

2 valve and pump

3 pump only

0 0 to 3
C17 MANL manual level 0 -100 to 100 %
C18 CMDE Control Mode, when set to 0 disables control loop, sensors can be used for monitoring. Demands passed direct to outputs. 1 0 to 1
C19 ALRM alarm mode

0 ignore alarms

1 report alarms

2 report alarms, shut down all outputs on local alarm

3 report alarms, shut down all outputs on STOP alarm or local alarm

4 report alarms, shut down all outputs on STOP alarm only

0 0 to 4
C20 ALST

Alarm State sets the state which is considered to be the Alarm state for the External Alarm input:

0 open circuit

1 short circuit

0 0 to 1
C21 CLSC Cool Source; points Energy Demand to source of Cooling energy 0 0 to 8255

C22

 

OCDS Occupation Destination:
points Occupancy Demand at another controller
0 0 to 8255
C23 CLCT Cooling Demand Selector:

Set to1 if CLSC is pointing Energy Demand at a Provider module (Chiller Controller) - demand sent as a CT setpoint

Set to 0 if CLSC is pointing to another Secondary Circuit Controller - demand sent as a % signal

0 0 to 1

Monitoring Parameters

Label Doorway code Description
EXTI I1 (C30) External input (function depends on input mode)
OCC I2 (C31) Occupied
COND I4 (C33) Condensation Alarm (cooling version only)
RLYA I6 (C35) relay A
RLYB I7 (C36) relay B
RLYC I8 (C37) relay C
AUTO W1 (C38) Automatic, control mode
OVRD W2 (C39) Override
INLP W3 (C40) Interlock Pump (PCO sub module)
ESTF W4 (C41) Establish Flow (PCO sub module)
HAND W5 (C42) Manual HAND Override from Doorway
POT W6 (C43) enable use of optional potentiometer (special order hardware)
SERV W7 (C44) remote operation of registration (service) button
CGST W8 (C45) config mode status
  SENSORS  
CTMP S1 (C50) Chilled Water Temperature for control (resultant of processing by SACT)
DMND S2 (C51) Control output
REQD S3 (C52) Current setpoint
ZDMD S4 (C53) Highest demand from the zones
AVDM S5 (C54) Average demand from the zones
NOCC S6 (C55) Number of zones occupied
FLOW S7 (C56) Flow temperature
RTRN S8 (C57) Return Temperature (2 input hardware only - available by special order)
  KNOBS  
MAXF K1 (C60) Maximum Flow setpoint (for VTU and CTU)
MINF K2 (C61) Minimum Flow setpoint (for VTU only)

 

Digital Input Monitoring

ref   Description range
C180 DI A State of Digital input A 0 or 1
C181 DI B State of Digital input B 0 or 1
C182 DI C* State of Digital input C 0 or 1
C183 DI D* State of Digital input D 0 or 1
C184 DI E* State of Digital input E 0 or 1
C185 DI F* State of Digital input F 0 or 1