Manual Supplement
Model Number: 8682-KF1
Product/System Title: Adaptive Offset Controller with 2-Point
Flow Calibration and Reheat Control
Contents of this manual supplement include:
1) How to use this Manual Supplement
2) Sequence of operation
3) Menu item descriptions
• menu structure drawing
• description of software additions
• listing of software deletions
4) Modbus Communications
5) Wiring Diagrams
How to Use This Manual Supplement
This supplement replaces pages 13-36, Menu and Menu Items and pages 50-51, Appendix B Wiring
Information of the Model 8682 SUREFLOW Adaptive Offset Controller, Operation Service Manual
(P/N 1980288).
This supplement describes the menus and menu items used to configure and program the controller
and how to wire each component.
Sequence of Operation
The Model 8682-KF1 uses the standard Model 8682 pressure and tracking control algorithm. The
Model 8682-KF1 also features temperature control. The temperature control scheme provides
modulation of supply volume for cooling and modulation of a reheat valve for heating.
The Model 8682-KF1 laboratory control system uses a through-the-wall room pressure sensor to
measure pressure differential (direct pressure measurement) between the laboratory and corridor
(reference space), and receives temperature information from the thermostat (0-10 VDC, 50-85°F).
The pressure sensor is located on the corridor (reference space) side of the wall. The Model
8682-KF1 laboratory controller continuously monitors the thermostat information. The Model
8682-KF1 control algorithm modulates supply and general exhaust air flows to provide adequate
fume hood replacement air while maintaining room pressure differential and temperature control.
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Pressure Control Sequence:
The Model 8682-KF1 receives the pressure differential signal from the pressure sensor. If
pressure is at set point, the control algorithm maintains the offset. If pressure is not at set
point, the offset value is changed until pressure is maintained, or the minimum or maximum
offset value is reached. If the offset value:
Increases, the supply air is reduced until one of 3 events occur:
• Pressure set point is reached. The Model 8682-KF1 maintains the new offset.
• The offset range is exceeded. The offset will be at maximum attempting to reach
• Supply air minimum is reached. The general exhaust begins to open (was
Decreases, the supply air increases until one of 3 events occur:
• Pressure set point is reached. The Model 8682-KF1 maintains the new offset.
• The offset range is exceeded. The offset will be at minimum attempting to reach
• Supply air maximum is reached. The alarm will trigger to inform the user
NOTE: The pressure differential is a slow secondary control loop. The system initially starts
with a calculated offset value and then slowly adjusts the offset value to maintain
pressure differential.
The Model 8682-KF1 continuously monitors and displays pressure differential between the
laboratory and corridor (reference space). When the pressure differential is adequate, a green
light indicates a safe pressure differential is being maintained. Room pressure alarm set
points, configured into the controller, activate a red light and audible alarm when the room
pressure becomes insufficient or too great. In addition to a local indication of room pressure,
alarm contacts and RS 485 communications may be used to provide extensive information to a
building management system.
Temperature Control Sequence:
The 8682-KF1 receives a temperature input from a 0-10 volt (50-85°F) thermostat. The Model
8682-KF1 controller maintains temperature control by:
(1) Controlling supply and general exhaust for ventilation and cooling
(2) Controlling the reheat coil for heating
Manual Supplement
pressure set point. An alarm will trigger to inform the user pressure differential
is not being maintained.
closed) to maintain pressure differential.
pressure set point. An alarm will trigger to inform the user pressure differential
is not being maintained.
pressure differential is not being maintained.
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The Model 8682-KF1 has three supply flow minimum set points. The ventilation set point is
the minimum flow volume required to meet ventilation needs of the laboratory (ACPH). The
temperature supply set point (TEMP MIN) is the minimum flow required to meet temperature
needs of the laboratory. The unoccupied set point is the minimum flow required when the lab
is not occupied. All of these set points are configurable.
The Model 8682-KF1 continuously compares the temperature set point to the actual space
temperature. If set point is being maintained, no changes are made. If set point is not being
maintained, and the space temperature is rising the controller will first modulate the reheat
valve closed. If the reheat valve is closed the controller will then increase the supply volume
to meet the cooling demand. If the space temperature is falling the controller will first reduce
the supply volume. If the supply volume reaches its minimum, ventilation or hood demand,
the controller will then modulate the reheat coil open to meet the heating demand.
If the general exhaust is in the closed position and fume hood loads require additional
replacement air, the Model 8682-KF1 will override ventilation or temperature set points to
modulate supply for pressurization control. Temperature will then be controlled by reheat in
this sequence.
Manual Supplement
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Manual Supplement
Menu and Menu Items
UREFLOW
The S
This section describes all of the menu items available to program and change. Changing any item is
accomplished by using the keypad, or if communications are installed, through the RS-485
Communications port. If you are unfamiliar with the keystroke procedure please see Programming
Software for a detailed explanation. This section provides the following information:
- Complete list of menu and all menu items.
- Gives the menu or programming name.
- Defines each menu item’s function; what it does, how it does it, etc..
- Gives the range of values that can be programmed.
- Gives default item value (how it shipped from factory).
The menus covered in this section are divided into groups of related items to ease programming. As
an example all set points are in one menu, alarm information in another, etc. The manual follows
the menus as programmed in the controller. The menu items are always grouped by menu and then
listed in menu item order, not alphabetical order. Figure 1, on the next 2 pages, shows a chart of all
the Model 8682-KF1 controller menu items.
SETPOINTS
SET POINT
REM SETPOINT
VENT MIN SET
TEMP MIN SET
UNOCCUPY SET
MAX SUP SET
MIN EXH SET
MIN OFFSET
MAX OFFSET
TEMP SETP
ACCESS CODE
CONTROL
SPEED
SENSITIVITY
CONTROL SIG
TEMP CONTROL
KC VALUE
TI VALUE
KC OFFSET
TEMP KC VAL
ACCESS CODE
is a very versatile device that can be configured to meet your specific application.
ALARM
LOW ALARM
HIGH ALARM
REM LOW ALM
REM HIGH ALM
MIN SUP ALM
MAX EXH ALM
ALARM RESET
AUDIBLE ALM
ALARM DELAY
MUTE TIMEOUT
ACCESS CODE
SYSTEM FLOW
TOT SUP FLOW
TOT EXH FLOW
OFFSET VALUE
SUP SET POINT
EXH SET POINT
ACPH
ACCESS CODE
CONFIGURE
DISPLAY AVG
UNITS
ROOM VOLUME
EXH CONFIG
ACCESS CODE
FLOW CHECK
HD1 FLOW IN
HD2 FLOW IN
HD3 FLOW IN
HD4 FLOW IN
HD5 FLOW IN
HD6 FLOW IN
HD7 FLOW IN
EX1 FLOW IN
EX2 FLOW IN
SP1 FLOW IN
SP2 FLOW IN
SP3 FLOW IN
SP4 FLOW IN
ACCESS CODE
CALIBRATION
SENSOR ZERO
SENSOR SPAN
ELEVATION
TEMP CAL
ACCESS CODE
DIAGNOSTICS
CONTROL SUP
CONTROL EXH
CONTROL TEMP
SENSOR INPUT
SENSOR STAT
TEMP INPUT
OCCUPANT SWT
KEY SWITCH
LOW ALM REL
HIGH ALM REL
LOW SUP REL
HIGH EXH REL
PRESS AOUT
SUPPLY AOUT
EXHAUST AOUT
ACCESS CODE
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INTERFACE
NET PROTOCOL
NET ADDRESS
OUTPUT RANGE
OUTPUT SIG
MAX FLOW OUT
ACCESS CODE
Manual Supplement
SUPPLY FLOW
SP1 DCT AREA
SP2 DCT AREA
SP3 DCT AREA
SP4 DCT AREA
SP1 FLO ZERO
SP2 FLO ZERO
SP3 FLO ZERO
SP4 FLO ZERO
FLO STA TYPE
XDCR OUT
TOP VELOCITY
SP LOW SETP
SP HIGH SETP
SP1 LOW CAL
SP1 HIGH CAL
SP2 LOW CAL
SP2 HIGH CAL
SP3 LOW CAL
SP3 HIGH CAL
SP4 LOW CAL
SP4 HIGH CAL
RESET CAL
ACCESS CODE
HOOD FLOW
HD1 DCT AREA
HD2 DUCT AREA
HD3 DUCT AREA
HD4 DUCT AREA
HD5 DUCT AREA
HD6 DUCT AREA
HD7 DUCT AREA
HD1 FLO ZERO
HD2 FLO ZERO
HD3 FLO ZERO
HD4 FLO ZERO
HD5 FLO ZERO
HD6 FLO ZERO
HD7 FLO ZERO
FLO STA TYPE
XDCR OUT
TOP VELOCITY
HD1 LOW CAL
HD1 HIGH CAL
HD2 LOW CAL
HD2 HIGH CAL
HD3 LOW CAL
HD3 HIGH CAL
HD4 LOW CAL
HD4 HIGH CAL
HD5 LOW CAL
HD5 HIGH CAL
HD6 LOW CAL
HD6 HIGH CAL
HD7 LOW CAL
HD7 HIGH CAL
MIN HD1 FLOW
MIN HD2 FLOW
MIN HD3 FLOW
MIN HD4 FLOW
MIN HD5 FLOW
MIN HD6 FLOW
MIN HD7 FLOW
RESET CAL
ACCESS CODE
EXHAUST FLOW
EX1 DCT AREA
EX2 DCT AREA
EX1 FLO ZERO
EX2 FLO ZERO
FLO STA TYPE
XDCR OUT
TOP VELOCITY
EX LOW SETP
EX HIGH SETP
EX1 LOW CAL
EX1 HIGH CAL
EX2 LOW CAL
EX2 HIGH CAL
RESET CAL
ACCESS CODE
Figure 1: Menu Items - Model 8682-KF1 Controller
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Manual Supplement
Software Additions
The Model 8682-KF1 has additional programmable software items. The unit works similar to a
standard model, with several additions.
SET POINT MENU
SOFTWARE
NAME
REM SETPOINT The REM SET POINT item sets the pressure set point
TEMP SETP
ITEM DESCRIPTION
upon activation of a changeover switch.
Pressure Differential is not maintained by direct pressure
control; i.e. modulating dampers in response to pressure
changes. The pressure signal is an AOC input, that is
used to calculate the required air flow offset value. The
calculated offset value changes the supply (or exhaust)
flow volume which changes the pressure differential.
When the calculated offset value is less than the MIN
OFFSET or greater than the MAX OFFSET, pressure
control will not be maintained.
The TEMP SETP item sets the temperature set point of
the space.
ITEM RANGE
(DEFAULT VALUE)
-0.19500 “H2O to
+0.19500 “ H2O
(-0.0020 “ H2O)
50 °F - 85 °F
(68 °F)
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ALARM MENU
SOFTWARE
NAME
REM LOW ALM
REM HIGH ALM
MAX EXH ALM
The REM LOW ALM menu item sets the remote low
pressure alarm set point. A low alarm condition is
defined as when the room pressure falls below or goes in
the opposite direction of the REM LOW ALM set point.
The REM LOW ALM is only activated when the
controller is at the REM SET POINT.
The REM HIGH ALM menu item sets the remote high
pressure alarm set point. A high alarm condition is
defined as when the room pressure exceeds (is more
positive or more negative than) the REM HIGH ALM set
point. The REM HIGH ALM is only activated when the
controller is at the REM SET POINT.
The MAX EXH ALM sets the maximum exhaust flow
alarm set point. A maximum exhaust alarm is defined as
when the total exhaust exceeds the MAX EXH ALM set
point.
Note: The Model 8682-KF1 has a relay contact that
corresponds to the MAX EXH ALM. This alarm
relay replaces the LOW EXHAUST FLOW
ALARM relay (Digital Alarm Output 2), (AOC,
pins 56 and 57).
CALIBRATION MENU
SOFTWARE
NAME
TEMP CAL
The TEMP CAL is used to enter the actual space
temperature. This adjustment offsets the temperature
sensor curve.
Manual Supplement
ITEM DESCRIPTION
ITEM DESCRIPTION
ITEM RANGE
ITEM RANGE
(DEFAULT VALUE)
OFF
-0.18500 “ H2O to
+0.18500 “ H2O
(OFF)
OFF
-0.18500 “ H2O to
+0.18500 “ H2O
(OFF)
OFF
0 - 30,000 CFM
(OFF)
50 °F - 85 °F
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CONTROL MENU
SOFTWARE
NAME
TEMP
CONTROL
TEMP KC VAL
The TEMP CONTROL item determines the control
signal’s output direction. As an example: If the control
system closes the reheat valve instead of opening this
valve, this option will reverse the control signal to now
open the valve.
The TEMP KC VAL item provides the user with the
ability to manually change the control loop speed.
The TEMP KC VALUE item is used to read and change
the gain control coefficient. When this item is entered, a
value for Kc is indicated on the display. If the S
is not controlling correctly, the Kc gain control
coefficient may need adjusting. Decreasing Kc will slow
the control system down, which will increase stability.
Increasing Kc will increase the control system speed,
which may cause system instability.
Manual Supplement
ITEM DESCRIPTION
UREFLOW
ITEM RANGE
(DEFAULT VALUE)
DIRECT OR REVERSE
(DIRECT)
0 to 1000
(100)
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FLOW CHECK MENU
SOFTWARE
NAME
SP3 FLOW IN
SP4 FLOW IN
The SP# FLOW IN menu item displays the current supply
air flow. This item is a diagnostics tool used to compare
the supply flow to a traverse of the duct work. If flow error
is greater than 10%, adjust the SP# DUCT AREA until the
error is within 10%. In addition, summing the SP# FLOW
IN should equal the TOT SUP FLOW.
When a volt meter is hooked to the flow station output, a
voltage should be displayed. The exact voltage displayed is
relatively unimportant. It is more important that the voltage
is changing, which indicates the flow station is working
correctly. For a 0.5 “H2O transducer,
Manual Supplement
ITEM DESCRIPTION
0 volts displayed equals zero flow
5 volts displayed equals 2832 ft/min x duct area
(ft2) - pressure based flow station
5 volts displayed equals TOP VELOCITY x duct
area (ft2) - linear based flow station
ITEM RANGE
(DEFAULT VALUE)
NONE: Read only value
(NONE)
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DIAGNOSTICS MENU
SOFTWARE
NAME
CONTROL
TEMP
TEMP INPUT
OCCUPANT
SWT
KEY SWITCH
HIGH EXH REL
The CONTROL TEMP item manually changes the control
output signal to the reheat valve. When this item is entered, a
number between 0 and 255 will be shown on the display
indicating the control output value. Pressing the ▲/▼ keys
changes the count on the display. Pressing the ▲ key increases
the displayed value, while pressing the ▼ key decreases the
displayed value. The reheat control valve should modulate as the
number changes. Depending on the valve, 0 or 255 is full open.
A count of 150 should position the valve approximately 1/2 open.
WARNING: The CONTROL TEMP function overrides the
AOC control signal. Adequate space temperature will NOT be
maintained while in this item.
The TEMP INPUT item shows the current temperature reading.
The OCCUPANT SWT item shows the status of the occupancy
switch input. This can be used to test the occupancy switch
connection.
The KEY SWITCH item shows the status of the key switch,
which selects either the main or the remote set points. If the
KEY SWITCH item displays OPEN, then the main set points are
in use. If the KEY SWITCH item displays CLOSED, then the
remote set points are used.
The HIGH EXH REL item is used to change the state of the high
exhaust relay. When the HIGH EXH REL is entered, the display
will indicate either OPEN or CLOSED. The ▲/▼ keys are used
to toggle the state of the relay. The ▲ key will OPEN the alarm
contact. Pressing the ▼ key will CLOSE the alarm contact.
When the contact is closed, the relay is in an alarm condition.
Manual Supplement
ITEM DESCRIPTION
ITEM RANGE
0 - 255
NORMAL
UNOCCUPIED
OPEN
CLOSED
OPEN
CLOSED
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SUPPLY FLOW MENU
SOFTWARE
NAME
SP3 DUCT AREA
SP4 DUCT AREA
SP3 FLO ZERO
SP4 FLO ZERO
XDCR OUT
SP LOW SETP
SP HIGH SETP
The SP# DUCT AREA item inputs the supply duct size. The
duct size is needed to compute the flow out of the supply duct.
This item requires a flow station to be mounted in each supply
duct.
If the DIM displays English units, area must be entered in square
feet. If metric units are displayed, area must be entered in square
meters.
The SP# FLO ZERO item establishes the flow station zero flow
point. A zero or no flow point needs to be established in order to
obtain a correct flow measurement output (see Calibration
section).
All pressure based flow stations need to have a SP# FLO ZERO
established on initial set up. Linear flow stations with a
1-5 VDC output also need to have a SP# FLO ZERO
established. Linear flow stations with a 0-5 VDC output do not
need a SP# FLO ZERO.
The XDCR OUT menu item allows the user to select the
maximum range of the pressure transducer used with the flow
stations.
The SP LOW SETP menu item sets the supply damper position
for supply low flow calibration.
The SP HIGH SETP menu item sets the supply damper position
for the supply high flow calibration.
Manual Supplement
ITEM DESCRIPTION
ITEM RANGE
(DEFAULT)
0 - 10 ft2
0 - 0.95 m2
(0)
The DIM does not
compute duct area.
The area must first
be calculated and
then entered into
the unit.
NONE
0.1, 0.2, 0.3, 0.4,
0.5 “H2O
25, 50, 75, 100, 125
pascals
(0.5 in H2O
125 pascals)
0-255
0-255
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SUPPLY FLOW MENU
SOFTWARE
NAME
SP1 LOW CAL
SP2 LOW CAL
SP3 LOW CAL
SP4 LOW CAL
SP1 HIGH CAL
SP2 HIGH CAL
SP3 HIGH CAL
SP4 HIGH CAL
RESET CAL
The SP# LOW CAL menu items display the currently measured
supply flow rate and the calibrated value for that supply flow.
The supply dampers will move to the SP LOW SETP damper
position for the low calibration. The calibrated supply flow can
be adjusted using the ▲/▼ keys to make it match a reference
measurement. Pressing the SELECT key will save the new
calibration data.
The SP# HIGH CAL menu items display the currently
measured supply flow rate and the calibrated value for that
supply flow. The supply dampers will move to the SP HIGH
SETP damper position for the low calibration. The calibrated
supply flow can be adjusted using the ▲/▼ keys to make it
match a reference measurement. Pressing the SELECT key will
save the new calibration data.
The RESET CAL menu item zeroes out the calibration
adjustments for the 4 supply flows. When this menu item is
entered, the 8682-KF1 will prompt the user to verify that they
want to do this. Press the SELECT key to reset the calibrations,
and the MENU key to reject it.
Manual Supplement
ITEM DESCRIPTION
ITEM RANGE
(DEFAULT)
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HOOD FLOW MENU
SOFTWARE
NAME
XDCR OUT
HD1 LOW CAL
HD2 LOW CAL
HD3 LOW CAL
HD4 LOW CAL
HD5 LOW CAL
HD6 LOW CAL
HD7 LOW CAL
HD1 HIGH CAL
HD2 HIGH CAL
HD3 HIGH CAL
HD4 HIGH CAL
HD5 HIGH CAL
HD6 HIGH CAL
HD7 HIGH CAL
MIN HD1 FLOW
MIN HD2 FLOW
MIN HD3 FLOW
MIN HD4 FLOW
MIN HD5 FLOW
MIN HD6 FLOW
MIN HD7 FLOW
RESET CAL
The XDCR OUT menu item allows the user to select the
maximum range of the pressure transducer used with the flow
stations.
The HD# LOW CAL menu items display the currently measured
fume hood flow rate and the calibrated value for that fume hood
flow. The calibrated hood flow can be adjusted using the ▲/▼
keys to make it match a reference measurement. Pressing the
SELECT key will save the new calibration data.
The HD# HIGH CAL menu items display the currently measured
fume hood flow rate and the calibrated value for that fume hood
flow. The calibrated hood flow can be adjusted using the ▲/▼
keys to make it match a reference measurement. Pressing the
SELECT key will save the new calibration data.
The MIN HD# FLOW menu items adjust the minimum flow
value for each fume hood input. Use this menu item if the fume
hood flow measurements are too low when the sash is closed.
The RESET CAL menu item zeroes out the calibration
adjustments for the 7 hood flows. When this menu item is
entered, the 8682-KF1 will prompt the user to verify that they
want to do this. Press the SELECT key to reset the calibrations,
and the MENU key to reject it.
Manual Supplement
ITEM DESCRIPTION
ITEM RANGE
(DEFAULT)
0.1, 0.2, 0.3, 0.4,
0.5 “H2O
25, 50, 75, 100, 125
pascals
(0.5 in H2O
125 pascals)
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Manual Supplement
EXHAUST FLOW MENU
SOFTWARE
NAME
XDCR OUT
EX LOW SETP
EX HIGH SETP
EX1 LOW CAL
EX2 LOW CAL
EX1 HIGH CAL
EX2 HIGH CAL
RESET CAL
The XDCR OUT menu item allows the user to select the
maximum range of the pressure transducer used with the flow
stations.
The EX LOW SETP menu item sets the general exhaust damper
position for general exhaust low flow calibration.
The EX HIGH SETP menu item sets the general exhaust damper
position for the general exhaust high flow calibration.
The EX LOW CAL menu items display the currently measured
general exhaust flow rate and the calibrated value for that general
exhaust flow. The calibrated general exhaust can be adjusted
using the ▲/▼ keys to make it match a reference measurement.
Pressing the SELECT key will save the new calibration data.
The EX HIGH CAL menu items display the currently measured
general exhaust flow rate and the calibrated value for that general
exhaust flow. The calibrated general exhaust flow can be
adjusted using the ▲/▼ keys to make it match a reference
measurement. Pressing the SELECT key will save the new
calibration data.
The RESET CAL menu item zeroes out the calibration
adjustments for the 7 hood flows. When this menu item is
entered, the 8682-KF1 will prompt the user to verify that they
want to do this. Press the SELECT key to reset the calibrations,
and the MENU key to reject it.
ITEM DESCRIPTION
ITEM RANGE
(DEFAULT)
0.1, 0.2, 0.3, 0.4,
0.5 “H2O
25, 50, 75, 100, 125
pascals
(0.5 in H2O
125 pascals)
0-255
0-255
Software Deletions
The following menu items have been deleted from the unit:
SETPOINTS menu: TEMP LOW
TEMP HIGH
ALARM menu: MIN EXH ALM
DIAGNOSTICS menu LOW EXH REL
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Manual Supplement
MODBUS Communications
Modbus communications are installed in the Model 8682-KF1 adaptive offset room pressure
controllers. This document provides the technical information needed to communicate between the
host DDC system and the Model 8682-KF1 units. This document assumes the programmer is
familiar with Modbus protocol. Further technical assistance is available from TSI if your question
is related to TSI interfacing to a DDC system. If you need further information regarding Modbus
programming in general, please contact:
Modicon Incorporated
One High Street
North Andover, MA 01845
Phone (508) 794-0800
The Modbus protocol utilizes the RTU format for data transfer and Error Checking. Check the
Modicon Modbus Protocol Reference Guide (PI-Mbus-300) for more information on CRC
generation and message structures.
The messages are sent at 9600 baud with 1 start bit, 8 data bits, and 2 stop bits. Do not use the
parity bit. The system is set up as a master slave network. The TSI units act as slaves and respond
to messages when their correct address is polled.
Blocks of data can be written or read from each device. Using a block format will speed up the
time for the data transfer. The size of the blocks is limited to 20 bytes. This means the maximum
message length that can be transferred is 20 bytes. The typical response time of the device is
around 0.05 seconds with a maximum of 0.1 seconds.
Unique to TSI
The list of variable addresses shown below skips some numbers in the sequence due to internal
Model 8682-KF1 functions. This information is not useful to the DDC system and is therefore
deleted. Skipping numbers in the sequence will not cause any communication problems.
All variables are outputted in English units: ft/min, CFM, or inches H20. The room pressure
control setpoints and alarms are stored in ft/min. The DDC system must convert the value to inches
of water if that is desired. The equation is given below.
Pressure in Inches H2O = 6.2*10-8*(Velocity in ft/min / .836)2
XRAM Variables
These variables can be read using Modbus command 03 Read Holding Registers. They can be
written to using Modbus command 16 Preset Multiple Regs. Many of these variables are the same
“menu items” that are configured from the SUREFLOW keypad. The calibration and control items
are not accessible from the DDC system. This is for safety reasons, since each room is individually
setup for maximum performance.
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Variable Name Variable
Software Version
Controller Type
Emergency Mode 2 Emergency Mode Control
Control Mode 3 Control mode of device.
Status Index
Room Velocity
Room Pressure
Total Supply Flow
Total Exhaust
Flow
Offset Setpoint
Air changes per
hour
Fume Hood 1
Flow
Fume Hood 2
Flow
Fume Hood 3
Flow
Fume Hood 4
Flow
Manual Supplement
8682-KF1 Variable List
Input Provided to Master
Address
0 Current Software Version 1.00 = 100
1 Controller Model Number 8682
4 Status of S
5 Velocity of room pressure Displayed in ft/min.
6 Room Pressure Displayed in inches H2O.
7 Total supply into laboratory Displayed in CFM.
8 Total exhaust out of laboratory Displayed in CFM.
9 Current offset setpoint Displayed in CFM.
10 Calculated room air changes Displayed in number per
11 Flow measured by flow station
12 Flow measured by flow station
13 Flow measured by flow station
14 Flow measured by flow station
System
Write only variable.
UREFLOW
connected to hood input #1.
connected to hood input #2.
connected to hood input #3.
connected to hood input #4.
device 0 Normal
Integer DDC system
receives
0 Leave emergency mode
1 Enter emergency mode
0 Normal
1 Unoccupied (Setback)
1 Dim Data Error
2 Alarm = Low Pressure
3 Alarm = High Pressure
4 Alarm = Min Supply
5 Alarm = Max Exhaust
6 Data Error
7 Cal Error
8 Emergency Mode
Host DDC system must
divide by 100,000 to
report pressure correctly
hour. Host DDC system
must divide value by 10 to
report ACPH correctly.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
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Variable Name Variable
Fume Hood 5
Flow
Fume Hood 6
Flow
Fume Hood 7
Flow
Exhaust 1 Flow
Exhaust 2 Flow
Supply 1 Flow
Supply 2 Flow
Supply 3 Flow
Supply 4 Flow
Pressure Setpoint 24 Pressure control setpoint Displayed in ft/min.
Min Vent
Setpoint
Min Temp
Setpoint
Unoccupied Min
Setpoint
Low Alarm 28 Low pressure alarm setpoint Displayed in ft/min.
High Alarm 29 High pressure alarm setpoint Displayed in ft/min.
Min Supply
Alarm
Max Exhaust
Alarm
Min Offset
Setpoint
Max Offset
Setpoint
Max Supply
Setpoint
Manual Supplement
Input Provided to Master
Address
15 Flow measured by flow station
16 Flow measured by flow station
17 Flow measured by flow station
18 Flow measured by flow station
19 Flow measured by flow station
20 Flow measured by flow station
21 Flow measured by flow station
22 Flow measured by flow station
23 Flow measured by flow station
25 Minimum flow setpoint for
26 Minimum flow setpoint for
27 Unoccupied (Setback) minimum
30 Minimum supply flow alarm Displayed in CFM.
31 Maximum general exhaust alarm Displayed in CFM.
32 Minimum offset setpoint Displayed in CFM.
33 Maximum offset setpoint Displayed in CFM.
34 Maximum supply setpoint Displayed in CFM.
System
connected to hood input #5.
connected to hood input #6.
connected to hood input #7.
connected to general exhaust
input #1.
connected to general exhaust
input #2.
connected to supply flow input #1
connected to supply flow input #2
connected to supply flow input #3
connected to supply flow input #4
ventilation.
temperature control.
flow setpoint.
Integer DDC system
receives
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Displayed in CFM.
Project:
Date:
Page 17 of 23 Released 2/15/02
Variable Name Variable
Min Exhaust
Setpoint
Temp Setpoint 36 Temperature setpoint
Output Range 38 Room pressure analog output
Output Mode 39 Analog output signal 0 4-20 ma
Elevation 40 Elevation above sea level 0-10,000 feet. Displayed in
Hood 1 Duct Area 41 Duct area in square feet Host DDC system must
Hood 2 Duct Area 42 Duct area in square feet Host DDC system must
Hood 3 Duct Area 43 Duct area in square feet Host DDC system must
Hood 4 Duct Area 44 Duct area in square feet Host DDC system must
Hood 5 Duct Area 45 Duct area in square feet Host DDC system must
Hood 6 Duct Area 46 Duct area in square feet Host DDC system must
Hood 7 Duct Area 47 Duct area in square feet Host DDC system must
Exhaust 1 Duct
Area
Exhaust 2 Duct
Area
Supply 1 Duct
Area
Manual Supplement
Input Provided to Master
Address
35 Minimum exhaust setpoint Displayed in CFM.
48 Duct area in square feet Host DDC system must
49 Duct area in square feet Host DDC system must
50 Duct area in square feet Host DDC system must
System
range
Integer DDC system
receives
Displayed in °F
0 Low
1 High
1 0-10 volt
1,000 feet increments.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
divide value by 1,000 to
report duct area correctly.
Project:
Date:
Page 18 of 23 Released 2/15/02
Variable Name Variable
Supply 2 Duct
Area
Room Volume 52 Room volume in cubic feet
Supply 3 Duct
Area
Control Action 56 Control output signal direction 0 Reverse
Supply 4 Duct
Area
Network Protocol 61 Network protocol for RS485
Network Address 62 Communication address of device Range is 1-247
Flow Output
Range
Hood Flow
Station Type
Exhaust Flow
Station Type
Supply Flow
Station Type
Hood Top
Velocity
Exhaust Top
Velocity
Supply Top
Velocity
Exhaust
Configuration
Alarm Mode 103 Latched or unlatched alarms 0 Unlatched
Manual Supplement
Input Provided to Master
Address
51 Duct area in square feet Host DDC system must
53 Duct area in square feet Host DDC system must
60 Duct area in square feet Host DDC system must
87 Flow analog output range setting 0 1,000 CFM
96 Type of flow station being used
97 Type of flow station being used
98 Type of flow station being used
99 Fume hood maximum velocity
100 General exhaust maximum
101 Supply maximum velocity range
102 Configuration of exhaust duct
System
(needed or ACPH calculation)
communications
in fume hoods.
in general exhaust.
in supply.
range of flow station.
velocity range of flow station.
of flow station.
work.
Integer DDC system
receives
divide value by 1,000 to
report duct area correctly.
Displayed in cubic feet.
divide value by 1,000 to
report duct area correctly.
1 Direct
divide value by 1,000 to
report duct area correctly.
0 Modbus
1 Cimetrics
1 5,000 CFM
2 10,000 CFM
3 20,000 CFM
5 50,000 CFM
0 Pressure based
1 Linear
0 Pressure based
1 Linear
0 Pressure based
1 Linear
0-5,000 ft/min
0-5,000 ft/min
0-5,000 ft/min
0 Unganged
1 Ganged
1 Latched
Project:
Date:
Page 19 of 23 Released 2/15/02
Variable Name Variable
Alarm Delay 104 Time delay before alarm activates Host DDC system must
Averaging Index 105 Display averaging period 0 .75 sec. 4 5 sec.
Units 106 Current pressure units displayed 0 Feet per minute
Audible Alarm 107 Audible alarm indication 0 Off
Mute Delay 108 Length of time alarm is muted
Set Code Enable 113 Setpoint menu access code enable 0 Off
Alarm Code
Enable
Configure igure
Code Enable
Cal Code Enable 116 Calibration menu access code
Control Code
Enable
System Code
Enable
Flow Code
Enable
Diag Code Enable 120 Diagnostic menu access code
Inter Code Enable 121 Interface menu access code
Hood Code
Enable
Exh Code Enable 123 Exhaust menu access code enable 0 Off
Manual Supplement
Input Provided to Master
Address
114 Alarm menu access code enable 0 Off
115 Configure menu access code
117 Control menu access code enable. 0 Off
118 System menu access code enable. 0 Off
119 Flow menu access code enable. 0 Off
122 Hood menu access code enable 0 Off
System
when mute key is pressed
enable.
enable.
enable.
enable
Integer DDC system
receives
divide value by 10 to report
alarm delay correctly.
1 1 sec. 5 10 sec.
2 2 sec. 6 20 sec.
3 3 sec. 7 40 sec.
1 meters per second
2 inches of H2O
3 Pascal
4 millimeters H2O
1 On
Host DDC system must
divide value by 600 to
report mute delay correctly.
1 On
1 On
0 Off
1 On
0 Off
1 On
1 On
1 On
1 On
0 Off
1 On
0 Off
1 On
1 On
1 On
Project:
Date:
Page 20 of 23 Released 2/15/02
Manual Supplement
Variable Name Variable
Address
Input Provided to Master
System
Integer DDC system
receives
Sup Code Enable 124 Supply menu access code enable 0 Off
1 On
Temperature 337 Current temperature value
°F
*Note: Items in italics are read only variables.
EXAMPLE of 16 (10 Hex) Preset Multiple Regs function format:
This example changes the minimum ventilation setpoint to 1000 CFM
QUERY RESPONSE
Field Name (Hex) Field Name (Hex)
Slave Address 01 Slave Address 01
Function 10 Function 10
Starting Address Hi 00 Starting Address Hi 00
Starting Address Lo 19 Starting Address Lo 19
No. Of Registers Hi 00 No. of Registers Hi 00
No. Of Registers Lo 01 No. of Registers Lo 01
Data Value (High) 03 Error Check (CRC) -Data Value (Low) E8
Error Check (CRC) --
Example of 03 Read Holding Registers function format:
This example reads the total supply and total exhaust.
QUERY RESPONSE
Field Name (Hex) Field Name (Hex)
Slave Address 01 Slave Address 01
Function 03 Function 03
Starting Address Hi 00 Byte Count 04
Starting Address Lo 07 Data Hi 03
No. Of Registers Hi 00 Data Lo 8E (1000 CFM)
No. Of Registers Lo 02 Data Hi 04
Error Check (CRC) -- Data Lo B0 (1200 CFM)
Error Check (CRC)
Project:
Date:
Page 21 of 23 Released 2/15/02
Manual Supplement
Wiring Diagrams
ADAPTIVE O FFS ET CONTRO LLER
+
1
DIGITAL INPUT 1
2
+
3
DIGITAL INPUT 2
4
+
5
FUM E HOOD EX. 1
6
+
7
FUM E HOOD EXHAU ST 2
8
+
9
FUM E HOOD EXHAU ST 3
10
+
11
FUM E HOOD EXHAU ST 4
12
+
13
FUM E HOOD EXHAU ST 5
14
+
15
FUM E HOOD EXHAU ST 6
16
17
+
FUM E HOOD EXHAU ST 7
-
18
+
19
SENSOR SIGNAL IN
20
+
21
AUX. EXHAUST 1
22
+
23
AUX. EXHAUST 2
24
+
25
SUPPLY 1
26
+
27
SUPPLY 2
28
+
29
TEM PERATU RE
30
+
31
AUX. INPUT
32
MODEL 8682 - KF1
MODEL 8682-KF1
WIRING DIAGRAM - ELECTRIC
WIRING DIAG RAM - ELECTRIC
25 26
23
24
+
POW ER (24 VAC )
RS485 PORT
D.I.M. COMM
NODE
STATUS
33
-
34
35EARTH GND
+
36
-
37
+
38
-
39
+
40
-
41
+
42
-
43
+
44
-
45
+
46
-
47
+
48
-
49
+
50
-
51
+
52
-
53
+
54
-
55
+
56
-
57
POW ER (2 4 VA C )
INTERFACE M ODULE
LO N W OR KS R S 485 PO RT
AUX. ANALOG OUTPUT
SUPPLY CO NTROL OUTPUT
AUX. EXHAUS T CONTROL OUTPUT
ANALOG OUTPUT 1
ANALOG OUTPUT 2
DIGITAL ALARM OUTPUT 1
DIGITAL ALARM OUTPUT 2
Project:
Date:
Page 22 of 23 Released 2/15/02
Manual Supplement
MODEL 8682 - KF1
MODEL 8682-KF1
ADAPTIVE O FFS ET C O N TR O LLE R
WIRING DIAGRAM - PNEUMATIC
WIRING DIAG RAM - PN EU M ATIC
2523
26
24
+
1
DIGITAL INPUT 1
2
+
3
DIGITAL INPUT 2
4
+
5
FUM E HOOD EX. 1
6
+
7
FUM E HOOD EXHAU ST 2
8
+
9
FUM E HOOD EXHAU ST 3
10
+
11
FUM E HOOD EXHAU ST 4
12
+
13
FUM E HOOD EXHAU ST 5
14
+
15
FUM E HOOD EXHAU ST 6
16
17
+
FUM E HOOD EXHAU ST 7
-
18
+
19
SENSOR SIGNAL IN
20
+
21
AUX. EXHAUST 1
22
+
23
AUX. EXHAUST 2
24
+
25
SUPPLY 1
26
+
27
SUPPLY 2
28
+
29
TEMPERATUR E
30
+
31
AUX. INPUT
32
POW ER (2 4 VA C )
INTERFACE MODULE
POW ER (2 4 VAC)
LO NW O RK S RS485 PORT
AUX. ANALOG OUTPUT
SUPPLY CONTROL OUTPUT
AUX. EXHAUST CONTROL OUTPUT
ANALOG OUTPUT 1
ANALOG OUTPUT 2
DIGITAL ALAR M OUTPUT 1
DIGITAL ALAR M OUTPUT 2
EARTH GND
RS485 PORT
D.I.M. COMM
NODE
STATUS
+
33
-
34
35
+
36
-
37
+
38
-
39
+
40
-
41
+
42
-
43
+
44
-
45
+
46
-
47
+
48
-
49
+
50
-
51
+
52
-
53
+
54
-
55
+
56
-
57
Project:
Date:
Page 23 of 23 Released 2/15/02
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