Honeywell Excel 10 W7752D User Manual page 49

NV name field name
nviApplicMode
nviDlcShed
nviEmerg
nviFanSpeedCmd value
nviFanSpeedCmd state
nviInUse
Table C3. Input Variables for Excel 10 FCU Controllers
digital
engineering units:
state
English (metric) or states plus
or
range
value
SNVT_hvac_mode
HVAC_AUTO 0
HVAC_HEAT 1
HVAC_COOL 3
HVAC_OFF 6
HVAC_NUL 255
BYTE
NORMAL 0
SETPOINT_SHIFT 1
SNVT_hvac_emerg
EMERG_NORMAL 0
EMERG_PRESSURIZE 1
EMERG_DEPRESSURIZE 2
EMERG_PURGE 3
EMERG_SHUTDOWN 4
EMERG_NUL 255
SNVT_switch
0 to 100%
SNVT_switch
OFF 0
ON 1
NUL 255
UWORD
0 to 65535
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
default
HVAC_AUTO This input variable coordinates the controller operation with the
(if bound but fails to be main equipment controller. Depending upon the available supply
received or at application energy, the main equipment controller commands the Fan Coil
restart) Unit controller to operate in heat mode only, cool mode only or
heat and cool mode if appropriate to the configuration.
HVAC_AUTO means that both heating and cooling equipment are
available, and the current mode is determined by the control
algorithm depending upon the room temperature and effective
setpoint. HVAC_AUTO is invalid for changeover applications.
When the Digital input is configured for Heat/Cool changeover
input, this input will always have priority over the network
nviApplicMode's HVAC_HEAT or HVAC_COOL.
0 (if bound but fails to be This input variable is from an energy management system. When
received or at application it is 0, the temperature control algorithm operates in a normal
restart) mode. When it is 1, the effective setpoint will be shifted by the
amount defined in nciEmergyManag.si_dlc_setpt_bump. For
cooling the effective setpoint will be increased, for heating the
effective setpoint will be decreased always with regard to the frost
protection limit.
EMERG_NORMAL This input variable is an emergency input from a device that
(at application restart) determines the correct action during a given emergency (such as
a fire).
• EMERG_NORMAL, EMERG_NUL: terminate EMERG_
commands and restores the control algorithm.
• EMERG_PRESSURIZE, EMERG_PURGE,
EMERG_SHUTDOWN: heat/cool outputs OFF, fan ON at
highest speed.
• EMERG_DEPRESSURIZE: heat/cool outputs OFF, fan OFF.
100% This input variable allows control of the fan speed by another
(at application restart) node, such as another Fan Coil Unit Controller acting as a master
in a master/slave relationship.
NUL See above.
(at application restart)
0 (if bound but fails to be This input variable is used by the engineering tool or other
received), 65535 ( for 60s supervisory node that it is "logged on" to the controller node. It
at application restart) should be set every minute, or the controller will reset it after 60s
to automatically log off the supervisory node.
47
comments
EN2B-0285GE51 R0909