Status Information - Honeywell CVL4022ASVAV1 Engineering Manual

Status Information

The LED on the front of the controller provides a visual
indication of the status of the device. When the controller
receives power, the LED appears in one of the following
allowable states, as described in Table 5.
Table 5. Status LED States.
LED State Blink Rate
OFF not applicable
ON ON steady;
not blinking
Very slow blink 1 second ON,
(continuous) 1 second OFF
Slow blink 0.5 second ON,
(continuous) 0.5 second OFF
Medium blink 0.25 second ON,
(continuous) 0.25 second OFF
Fast blink 0.10 second ON,
(continuous) 0.10 second OFF
Communications
Each controller uses an FTT transformer-coupled
communications port. The controller's Manchester encoded
data is presented to other controllers and devices on the
LONWORKS® Bus at 78 kilobits per second (kbs) via
Echelon® communication protocol. The transformer-coupled
communications interface offers a much higher degree of
common mode-noise rejection while assuring dc isolation.
The LONWORKS® Bus is polarity insensitive, eliminating
installation errors due to miswiring.
Sylk™ Bus
Sylk is a two wire, polarity insensitive bus that provides both
18 Vdc power and communications between Sylk-enabled
devices. Using Sylk-enabled devices saves I/O on the
controller and is faster and cheaper to install since only two
wires are needed and the bus is polarity insensitive.
LONMARK® Functional Profile
The CVL Controllers support the LONMARK® Functional
Profile number 8010 VAV Controller, version 1.0.
Network Variables Profile
Network variables, as described in Table 6, are communicated
over the LONWORKS® Bus. The controller's built-in functions
provide for the selection of variables, which are available from/
to the network.
In Table 6, the network variable prefixes have the following
meaning:
31-00083—02
Status or Condition
No power to processor,
LED damaged, low
voltage to board, or
controller damaged.
Processor and/or
controller is not operating.
Controller is operating
normally.
Controller alarm is active,
controller in process of
download, or controller
lost its configuration.
Controller firmware is
loading.
Controller is in manual
mode under control of the
PC-based software tool.
• nvi - Network Variable Input
• nvo - Network Variable Output
Hardware
Outputs
Object Type #8010
nviSpaceTemp
nv1
SNVT_temp_p
nviSetPoint
nv2
SNVT_temp_p
nviApplicMode
nv5
SNVT_hvac_mode
nviManOverride
nv6
SNVT_hvac_overid
nviSetPtOffset
nv7
SNVT_ temp_diff_p
nviOccCmd
nv8
SNVT_occupancy
nviEmergCmd
nv9
SNVT_hvac_emerg
nv10 nviBoxFlow
SNVT_ flow
nviEnergyHoldOff
nv11
SNVT_switch
nv12 nviFanSpeed
SNVT_switch
nviCO
2
nv13
SNVT_ ppm
nviHeaterOverid
nv14
SNVT_switch
nviDuctInTemp
nv15
SNVT_temp_p
Configuration Properties
nc49 - Send Heartbeat (mandatory)
nc60 - Occupancy Temperature
Setpoints (mandatory)
nc48 - Maximum Receive Time (opt.)
nc52 - Minimum Send Time (opt.)
nc17 - Location (optional)
nc46 - Duct Area (optional)
Hardware
Table 6. Object Variables List
8
VAV Device
nvoSpaceTemp
nv3
SNVT_ temp_p
Mandatory
Network
Variables
nvoUnitStatus
nv4
SNVT_hvac_status
nvoEffectSetPt
nv16
SNVT_ temp_p
nvoFlowControlPt
nv17
SNVT_ flow
Optional
Network
nvoBoxFlow
nv18
Variables
SNVT_ flow
nvoTerminalLoad
nv19
SNVT_lev_percent
nvoEnergyHoldOff
nv20
SNVT_switch
nc54 - Minimum Flow (mandatory)
nc51 - Maximum Flow (mandatory)
nc55 - Minimum Flow for Heat (opt.)
nc56 - Minimum Flow Standby (opt.)
nc57 - Nominal Flow (optional)
nc66 - VAV gain (optional)
Manufacturer
Defined
Section
Input
M33894