Справочник Пользователя для Honeywell W7750A
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
29
74-2958—1
APPLICATION STEPS
Overview
The seven application steps shown in Table 6 are planning
considerations for engineering an Excel 10 W7750 System.
These steps are guidelines intended to aid understanding of
the product I/O options, bus arrangement choices,
configuration options and the Excel 10 W7750 Controller role
in the overall EXCEL 5000
considerations for engineering an Excel 10 W7750 System.
These steps are guidelines intended to aid understanding of
the product I/O options, bus arrangement choices,
configuration options and the Excel 10 W7750 Controller role
in the overall EXCEL 5000
OPEN
SYSTEM architecture.
Table 6. Application Steps.
Step 1. Plan the System
Plan the use of the W7750 Controllers according to the job
requirements. Determine the location, functionality and sensor
or actuator usage. Verify the sales estimate of the number of
W7750 Controllers, T7770 and T7560 Wall Modules required
for each model type. Also check the number and type of
output actuators and other required accessories.
requirements. Determine the location, functionality and sensor
or actuator usage. Verify the sales estimate of the number of
W7750 Controllers, T7770 and T7560 Wall Modules required
for each model type. Also check the number and type of
output actuators and other required accessories.
When planning the system layout, consider potential
expansion possibilities to allow for future growth. Planning is
very important to be prepared for adding HVAC systems and
controllers in future projects.
expansion possibilities to allow for future growth. Planning is
very important to be prepared for adding HVAC systems and
controllers in future projects.
T7560 Wall Modules can only be hard-wired, they have no
L
L
ON
W
ORKS
Bus access. T7770 Wall Modules can be installed
as either hard-wired I/O-only devices or additional wiring can
be run to them (for the L
be run to them (for the L
ON
W
ORKS
Bus network) to allow a
CARE/E-Vision operator terminal to have access to the
L
L
ON
W
ORKS
Bus. The application engineer needs to determine
how many wall modules, T7770s and T7560s are required. All
T7770 Wall Modules, except the T7770A1006 and the
T7770A1014, can be connected via the L
T7770 Wall Modules, except the T7770A1006 and the
T7770A1014, can be connected via the L
ON
W
ORKS
Bus jack.
Also the application engineer needs to know how many
T7770s without L
T7770s without L
ON
W
ORKS
Bus network connections are
being installed on the job, and then clearly document which
wall modules (if any) have network access. This information is
required during installation to ensure that the proper number
and type of wires are pulled to the wall modules, and the
building operators are informed about where they can plug in
to the L
wall modules (if any) have network access. This information is
required during installation to ensure that the proper number
and type of wires are pulled to the wall modules, and the
building operators are informed about where they can plug in
to the L
ON
W
ORKS
Bus network with a portable operator
terminal (see Fig. 18, 19 and 20). Refer to Step 4. Prepare
Wiring Diagrams for details, about the about the wiring
differences between the two types.
Wiring Diagrams for details, about the about the wiring
differences between the two types.
Fig. 18. Connecting the portable operator terminal
to the L
ON
W
ORKS
® Bus.
The FTT communication wiring, (L
ON
W
ORKS
Bus) between
controllers is a free topology scheme that supports T-tap, star,
loop, and mixed wiring architecture. Refer to the L
loop, and mixed wiring architecture. Refer to the L
ON
W
ORKS
Bus Wiring Guidelines form, 74-2865 for complete description
of network topology rules. See Application Step 3. Lay Out
Communications and Power Wiring, for more information on
bus wiring layout, and see Fig. 27 through 35 in Application
Step 4. Prepare Wiring Diagrams, for wiring details.
of network topology rules. See Application Step 3. Lay Out
Communications and Power Wiring, for more information on
bus wiring layout, and see Fig. 27 through 35 in Application
Step 4. Prepare Wiring Diagrams, for wiring details.
The application engineer must review the Direct Digital
Control (DDC) job requirements. This includes the Sequences
of Operation for the W7750 units, and for the system as a
whole. Usually there are variables that must be passed
between the W7750 Controllers and other zone controller(s),
or central plant controller(s) that are required for optimum
system-wide operation. Typical examples are the TOD Occ/
Unocc signal, the outdoor air temperature, the demand limit
control signal, and the smoke control mode signal.
Control (DDC) job requirements. This includes the Sequences
of Operation for the W7750 units, and for the system as a
whole. Usually there are variables that must be passed
between the W7750 Controllers and other zone controller(s),
or central plant controller(s) that are required for optimum
system-wide operation. Typical examples are the TOD Occ/
Unocc signal, the outdoor air temperature, the demand limit
control signal, and the smoke control mode signal.
It is important to understand these interrelationships early in
the job engineering process to ensure implemention when
configuring the controllers. (See Application Step 6. Configure
Controllers, for information on the various Excel 10
parameters and on Excel 10 point mapping.)
the job engineering process to ensure implemention when
configuring the controllers. (See Application Step 6. Configure
Controllers, for information on the various Excel 10
parameters and on Excel 10 point mapping.)
Step 2. Determine Other Bus Devices
Required
Required
A maximum of 62 nodes can communicate on a single
L
L
ON
W
ORKS
Bus segment. Each W7750 (CVAHU) Controller
constitutes one node. If more nodes are required, a Q7751A,B
Router is necessary. Using a router allows up to 125 nodes,
divided between two L
Router is necessary. Using a router allows up to 125 nodes,
divided between two L
ON
W
ORKS
Bus segments. The router
accounts for two of these nodes (one node on each side of the
router); a Q7750A Excel 10 Zone Manager takes one node
and two nodes are available for operator terminal nodes,
leaving 120 nodes available for Excel 10 Controllers. All 120
controllers are able to talk to each other through the router. A
Q7750A Excel 10 Zone Manager is required to connect the
L
router); a Q7750A Excel 10 Zone Manager takes one node
and two nodes are available for operator terminal nodes,
leaving 120 nodes available for Excel 10 Controllers. All 120
controllers are able to talk to each other through the router. A
Q7750A Excel 10 Zone Manager is required to connect the
L
ON
W
ORKS
Bus to the standard EXCEL 5000
OPEN
System C-Bus. Each Excel 10 Zone Manager supports up to
120 Excel 10 Controllers. This limit is set in the Excel 10 Zone
Manager database as an absolute maximum.
120 Excel 10 Controllers. This limit is set in the Excel 10 Zone
Manager database as an absolute maximum.
Step No.
Description
1
Plan The System
2
Determine Other Bus Devices Required
3
Lay Out Communications and Power Wiring
4
Prepare Wiring Diagrams
5
Order Equipment
6
Configure Controllers
7
Troubleshooting
M15120A
NOTEBOOK PC
L
ON
W
ORKS
BUS
PORT
EIA-232
SERIAL
PORT
SERIAL
PORT
Q7752A
SLTA
SLTA
CABLE
PART
NO. 205979
PART
NO. 205979
SHIELDED
INTERFACE
CABLE
INTERFACE
CABLE
EXCEL 10
W7750
CVAHU
CONTROLLER
W7750
CVAHU
CONTROLLER