User's Manual

EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
43 EN2B-0285GE51 R0909
Table C2. Configuration Variables for Excel 10 FCU Controllers
NV name field name
engineering units:
English (metric) or states
plus range
digital
state
or
value
default comments
nciFcuConfig cycle_time[0] SNVT_time_sec
0 to 1200s for stage output
0 to 600s for floating output
20 to 600s for PWM output
150 s for floating This configuration variable specifies for the output 1 configured as
• FLOATING: the runtime of the valve (time to run from fully closed to
fully open)
• PWM: the cycle time
• ONE_STAGE, TWO_STAGE, and THREE_STAGE: minimum ON
time before switching to the next stage.
nciFcuConfig cycle_time[1] SNVT_time_sec
0 to 1200s for stage output
0 to 600s for floating output
20 to 600s for PWM output
150 s for floating This configuration variable specifies for the output 2 configured as
• FLOATING: the runtime of the valve (time to run from fully closed to
fully open)
• PWM: the cycle time
• ONE_STAGE, TWO_STAGE, and THREE_STAGE: minimum ON
time before switching to the next stage.
nciFcuConfig min_stage_off_time[0] SNVT_time_sec
0 to 600 seconds
90 s This configuration variable is used only for ONE_STAGE,
TWO_STAGE, and THREE_STAGE output 1 and specifies the mini-
mum OFF time before switching to the next stage.
nciFcuConfig min_stage_off_time[1] SNVT_time_sec
0 to 600 seconds
90 s This configuration variable is used only for ONE_STAGE,
TWO_STAGE, and THREE_STAGE output 2 and specifies the mini-
mum OFF time before switching to the next stage
nciFcuConfig reheat_config BYTE
REHEAT
FREE_USE
REL_NOT_USED
0
1
255
REHEAT This configuration variable specifies the usage of the reheat relay.
FREE_USE specifies that the relay is controlled via the network using
the nviReheatRelay .
nciFcuConfig PwmZeroPosn SNVT_lev_percent
0 to 100%
0% This configuration variable specifies the zero position for PWM
actuators. This setting applies to PWM actuators only and is used for
both actuators if both are configured as PWM actuators.
nciFcuConfig PwmFullPosn SNVT_lev_percent
0 to 100%
100% This configuration variable specifies the fully open position for PWM
actuators. This setting applies to PWM actuators only and is used for
both actuators if both are configured as PWM actuators.
nciFcuGains si_pid_Xp[0] SNVT_temp_p
2.25 to 180 DDF
(1.25 to 100 K), 0 = Disable
36 DDF (20 K) This configuration variable specifies the throttling range for use in the
proportional portion of the PID loop gain for the cooling mode. The
minimum configurable value (not including 0 for disabling) is 3.6 DDF
(2 K) for PI or 2.25 DDF (1.25 K) for P control. For versions prior to
1.0.3, the minimum value is 7.2 DDF (4 K).