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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
EN2B-0285GE51 R0909 44
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
nciFcuGains si_pid_Xp[1] 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 heating 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).
nciFcuGains si_pid_Tn[0] SNVT_time_sec
10 to 3200 seconds
0 = Disable
250 s This configuration variable specifies the integral time for use in the
integral portion of the PID loop gain for the cooling mode.
nciFcuGains si_pid_Tn[1] SNVT_time_sec
10 to 3200 seconds
0 = Disable
250 s This configuration variable specifies the integral time for use in the
integral portion of the PID loop gain for the heating mode.
nciFcuGains si_pid_Tv[0] SNVT_time_sec
10 to 3200 seconds
0 = Disable
0 s This configuration variable specifies the derivative time for use in the
derivative portion of the PID loop gain for the cooling mode.
nciFcuGains si_pid_Tv[1] SNVT_time_sec
10 to 3200 seconds
0 = Disable
0 s This configuration variable specifies the derivative time for use in the
derivative portion of the PID loop gain for the heating mode.
nciFcuGains si_boost[0] SNVT_temp_p
0.9 to 18 DDF (0.5 to 10 K)
0 = Disable
1.8 DDF (1 K) This configuration variable specifies the temperature range to be
added to the cooling setpoint, above which the cooling output is fully
open to allow a faster response. For thermal actuators it is the
hysteresis for thermal control algorithm.
nciFcuGains si_boost[1] SNVT_temp_p
0.9 to 18 DDF (0.5 to 10 K)
0 = Disable
1.8 DDF (1 K) This configuration variable specifies the temperature range to be
subtracted from the heating setpoint, below which the heating output is
fully open to allow a faster response. For thermal actuators it is the
hysteresis for thermal control algorithm.
nciNumValve SNVT_count
TWO_PIPE
FOUR_PIPE
1
2
FOUR_PIPE This configuration variable specifies a two-pipe system (one valve) or a
four-pipe system (two valves). If set to TWO_PIPE, only the output
terminals for output1 are used. If set to FOUR_PIPE, output1 and
output2 are defined by nciFcuConfig.output_mode[].
nciSetPnts occupied_cool SNVT_temp_p
50 to 95°F (10 to 35°C)
73.4°F (23°C) This is the default setpoint for the occupied cooling setpoint which is
used in case there is no locally wired setpoint knob or nviSetpoint has
not been bound. Where the ZEB for occupied is used, it is derived from
the difference between occupied_cool and occupied_heat.