Controller Installation & Programming 867 -

Controller Installation & Programming 867 -
5
L
4
24VA
0.17 C
A,
50/6 4VA
0HZ
3
SHLD
2
1
-
+
INF
IN
PO ET
RT
867
UN
IN1
1
IN2
2
IVE
INP RSAL
UTS
IN3
3
IN4
RET
4
5
Controller
Installation & Programming
 2002, Andover Controls Corporation
All Rights Reserved
No part of this publication may be reproduced, read or stored in a retrieval
system, or transmitted, in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without prior written permission of
Andover Controls Corporation.
Produced in the United States of America.
Infinity, Continuum and CyberStation are trademarks of Andover Controls
Corporation. All other trademarks are the property of their respective owners.
i2867 Installation & Programming Guide , Version: B February, 2002
Andover Controls part number: 30-3001-796
The information in this book is furnished for informational purposes only, is
subject to change without notice, and should not be construed as a commitment
by Andover Controls Corporation. Andover Controls Corporation, assumes no
liability for any errors or inaccuracies that may appear in this document.
Andover Controls Corporation
300 Brickstone Square
Andover, MA 01810
(978) 470-0555
fax: (978) 470-0946
Andover Controls Corporation
Radio Interference
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions in this manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
Note
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.
Avis
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage
radioélectrique édicté par le ministère des Communications du Canada.
i2867 Installation & Programming Guide
Andover Controls Corporation
Contents
Introduction...................................................................... 1
i2867 Module Characteristics ......................................... 2
Mechanical Installation.................................................... 3
Power Connection ........................................................... 6
Battery Connection & Replacement...........................................6
24VAC Connection .....................................................................8
Building Ground Requirements ...............................................10
Infinet Network Connection .......................................... 11
Input Connections ......................................................... 12
Universal Inputs........................................................................12
Input Wiring ..............................................................................12
Wiring Concerns.......................................................................13
Input Pull-up Resistor Selection ..............................................13
Measuring Temperature ...........................................................15
Measuring DC Voltages............................................................18
Sensing Contact Closures .......................................................19
Counting Pulsing Signals or Contact Closures ......................20
Output Connections ...................................................... 21
Digital Outputs (Form A) ..........................................................23
Tri-state Output.........................................................................24
Combining Form A Outputs as a Tri-state Output ..................24
Analog Voltage Output .............................................................25
Smart Sensor Interface.............................................................26
Programming ................................................................. 27
Configuration............................................................................27
Operation After Power Loss.....................................................27
I/O Point Assignments..............................................................39
Pre-Operation Checks ..............................................................40
Troubleshooting............................................................. 41
i2867 Installation & Programming Guide
Andover Controls Corporation
TCX 865
5
L
4
24V
AC
0.17A
, 4V
50/60H
A
Z
3
SHLD
2
1
-
+
INFI
NE
PO T
RT
867
IN1
UN
IVER
INPU SAL
TS
IN2
IN3
1
IN4
2
3
4
RET
5
This manual describes the installation, and use of the i2867 Terminal Control Unit.
This compact terminal control unit provides low-cost DDC control of package units, VAV
boxes, unit ventilators, and other terminal unit applications with its versatile mix of inputs,
outputs, plus an interface to Andover Controls' Smart Sensor Bus.
The i2867 features combinations of universal inputs, Analog, Form A, and Tri-state
outputs for flexible control configurations.
The Infinet’s true peer-to-peer communications protocol provides the Infinity i2867 with
the ability to instantly communicate with an Infinity network controller such as the
Continuum NetController, as well as the entire network of Andover Infinet field controllers.
Up to 254 i2867 controllers can be networked to one network controller.
i2867 Installation & Programming Guide
1
i2867 Module Characteristics
The following lists the features included in the i2867 Controller Module:
•
4 Universal Inputs
•
1 Temperature Input/ Smart Sensor Bus Interface
•
5 Form A Triac Outputs
•
•
2 Analog Outputs (0-10V)
24VAC input power
•
Infinet Interface
If You Are Upgrading From the TCX 867
The i2867 includes many advantages over the TCX867 and a few differences.
The Triac output section of the i2867 is designed to provide low side switching.
Before replacing a TCX867 with this product make sure that your outputs are
wired as shown on page 23 of this manual.
If you are interfacing a Sensor Plus peripheral to the i2867, follow the directions given
in the Sensor Plus documentation (version C or higher) to detect the activation of the
override button. Do not use the procedure recommended for use with the TCX867.
Controller Limitations Using SX8000 Based Systems
Plain English Programs
Creating a program in the i2867 using the terminal interface that sets the digitalfilter
attribute of a voltage input will save successfully into the SX database, however, it
cannot be edited and saved. This is because the TCX867 Infinet I controller did not
include the ability to use this attribute.
Outputs
When you configure this controller using the SX8000 workstation, the TCX867
controller is selected. Although these controllers are similar in their input and output
configurations, the TCX 867 used outputs 1 and 2 as a hardwired tri-state output
while the i2867 includes the ability to separately address outputs 1 and 2. An error
will occur if you try to configure output 1 or 2 as anything but a tri-state.
Flash Memory Backup
The i2867 includes the ability to save the current configuration to on-board flash
memory. This new capability includes several new system variables and operating
modes. The SX8000, being an older software implementation, did not include any
capability to handle these new features automatically like the CyberStation can.
Therefore there are limitations when using the flash system in an SX8000
environment. Refer to the Operation/Programming section for specific instructions.
2
Andover Controls Corporation
Mechanical Installation
The i2867 Controller module is mounted directly to a panel using screws. Mounting
hardware is included as an integral part of the case design.
Note:
This equipment is intended for field installation within the enclosure of another
product.
The i2867 module plastic case is illustrated below:
5
L
4
24VA
0.17AC
,
50/604VA
HZ
3
SHLD
2
1
-
+
INFI
N
PO ET
RT
867
UN
IN1
1
IN2
2
IVER
INPU SAL
TS
IN3
3
IN4
4
RET
5
The reset switch and various status indicators may be accessed by lifting the hinged door
to the module as shown.
Status Indicators
Connections to
controlled/sensed
equipment
i2867 Installation & Programming Guide
3
On the back of the module are locking mounting extensions. The design allows the
module to be mounted directly to a panel using them as a bracket. A stand-off is molded
into the locking extension. To mount the module, pull both extensions out until they click
(locked position). Insert a screw through the standoff as shown below:
Locking Extension
Panel Mounting
4
Andover Controls Corporation
Overall Dimensions
The overall dimensions of the i2867 module are as shown:
i2867 Installation & Programming Guide
5
Power Connection
The i2867 Controller is operated via an individual external 24 Volt AC source. An
internal power converter creates the necessary DC voltages to supply the
microprocessor circuitry.
Should the AC source be interrupted during operation, backup power for the internal
controller state memory is provided by a coin-style 3 Volt Lithium battery. This battery
can maintain back-up status for five years' worth of accumulated power failures and
has a typical shelf life of at least ten years.
Battery Connection & Replacement
To access the battery holder, the module cover must be removed and the electronics
access cover must be removed. The cover is secured via two force fitting plastic
tabs. To remove the access cover after the main cover is opened, gently pry the
cover outward using your thumb and forefinger while lifting the cover. As shown
below:
While tabs are depressed, lift case backwards
Depress tabs on both sides
6
Andover Controls Corporation
Once the access cover is removed the printed circuit board is accessible. The
following illustrates the location of the battery holder in relation to the board:
BATTERY
During shipment, an insulating plastic tab is inserted under the clip on the battery to
prevent it from draining prior to installation. To activate the battery, this tab must be
removed.
Should it become necessary to replace the battery, the battery is placed in a coinstyle holder. The battery used in the i2867 is a type CR 1225, 48 mAhr 3.0 V primary
Lithium battery.
CAUTION
There is danger of explosion if the battery is incorrectly replaced.
Replace only with the same or equivalent type recommended above.
Dispose of used batteries according to manufacturer’s instructions.
i2867 Installation & Programming Guide
7
24VAC Connection
The i2867 controller is powered by an external 24 VAC source. This power supply is
connected via two terminals located on the Power/Communications connector. The
unit should receive power from its own independent, 24 VAC
+10% -15%,
50 or 60 Hz, 10 VA, un-switched circuit.
The Power/Communications connector is located on the top of the module case (as
viewed from the front) and consists of five pins.
The signals within that connector are as follows:
PIN
5
5 4
3 2
1
Function
24 VAC
5
4
L
(Earth GND)
3
Infinet Shield
2
Infinet -
1
Infinet +
4
24VA
0.17 C
A,
50/6 4VA
0HZ
3
SHLD
2
INF
TCX
--
1
+
INPFOINET
IN
R
PO TET
RT
+
867
867
UN
IN1
1
IN2
2
IVE
INP RSAL
UTS
IN3
3
IN4
4
RET
5
Connect 24VAC as shown below:
24 VAC Step-Down
Transformer
Optional 39V Varistor
for extremely noisy environments
X1
AC Line
Power
X2
Optional Varistor
choose a voltage rating appropriate to the
input voltage applied. i.e 130V or 250V
White or
Green
Black
5 4 3 2 1
i2867
8
Andover Controls Corporation
The 24 VAC connection consists of both terminals from the secondary of
a power-line to 24 VAC transformer. Connection to the Controller is
through push-on quick-disconnect screw type connector that is supplied
with the Controller. The ground wire at the transformer should not
exceed 12” in length and it must be connected to a good earth ground.
The screw that connects the ground wire with earth ground shall have a
green colored head that is hexagonal, slotted or both.
Powering Multiple i2867 Controllers
Unless all the i2867 controllers you intend to power are resident in the
same cabinet, it is imperative that you use a separate transformer for
each controller. When you attempt to power multiple remotely located
controllers from a single power source the voltage drop caused by the
current draw per controller (realize that the actuator may be using power
from the controller as well) results in marginal operation and in most
cases prevents proper communications between controllers.
Warning
Make sure that 24 VAC is not connected to the power cable while you
are wiring the controller, or you could receive an electrical shock that is
life-threatening.
i2867 Installation & Programming Guide
9
Building Ground Requirements
Be sure that all equipment from Andover Controls is grounded to true
Earth ground. True Earth ground protects the equipment from transients
and other power surges in the area. We cannot guarantee that the
controller system will operate as documented without a properly
grounded installation.
An example of a sub-standard ground is a galvanized steel cold water
pipe. As the pipe corrodes, it does not act as a true ground. The
corrosion acts as an insulator, raising the potential of the pipe with
respect to the ground.
When lightning strikes in the area of the installation, it drastically
changes the potential of the Earth. Since properly grounded Andover
Controls units respond to changes in potential more rapidly than poorly
grounded electrical systems, a poorly grounded building tries to reach
ground through the Andover Controls system. The surge of current can
destroy electronic components on the controller board. Surges of much
lower potential than lightning also impact the reliability of the equipment.
Inspecting the Ground
Be sure to have your grounds inspected before you begin the installation
process to be sure your municipality follows the National Electrical Code.
Many municipalities do not follow the code and often have substandard
electrical grounds.
Check your ground as follows:
Inspect the building power distribution panel for Earth-ground
termination. If the ground termination is any of the following, it is not
adequate and must be corrected:
Does not exist.
Is connected to a corroded or galvanized pipe.
Is connected using a small gauge wire (less than 14 AWG).
Be sure your Andover Controls cabinet is connected to the ground with a
copper conductor that terminates at the distribution panel.
Lightning Protection
Although metal oxide varistors are built into the board to protect against
power line transients, this protection is not sufficient to protect against
lightning. Lightning arresters are required at each point where Infinet
cables enter or exit a building. The following lightning arrester is
recommended:
Andover Controls # 01-2100-299, Two pair gas tube lightning arrester
10
Andover Controls Corporation
Infinet Network Connection
The i2867 controllers include an interface to the Andover Controls proprietary Infinet
network. Connection to the Infinet allows multiple controllers to communicate and be
controlled by a larger ‘host’ controller.
Connection to the Infinet requires access to an Infinet network cable. This cable
consists of two wires and a shield. Infinet connections are done at the
Power/Communications connector.
To wire the Controller to the Infinet, follow the steps below:
1. Trim the outer jacket of the Infinet cable to reveal the internal wires.
2. Strip the insulation from the white* wire and loosen the screw at position 1.
3. Insert the stripped end of the white* wire into the pin 1 position (‘+’ receptacle) of
the terminal block. Tighten the screw.
4. Strip the insulation from the black* wire and loosen the screw at position 2.
5. Insert the stripped end of the black* wire into the pin 2 position (‘-’ receptacle) of
the terminal block. Tighten the screw.
6. Insert the shield wire into the pin 3 position (‘SHLD’ receptacle) of the terminal
block. Tighten the screw.
* Wire colors are included for clarity. The colors of your cable may vary. However, make
sure that all Infinet connections are consistent on their connections.
1
2
3
4
5
Shield
Black (-)
White (+)
i2867 Installation & Programming Guide
11
Input Connections
Universal Inputs
The i2867 Controller includes Andover Controls Universal Inputs that are unique in
that they are software configurable to handle any one of a number of input types:
Thermistor
Voltage
Digital/Counter
Input Wiring
The actual input terminations are located on the bottom of the module. Connection is
via a removable five-connection screw terminal plug. The signals within that
connector are as follows:
PIN
1
Function
IN1
1 2
3 4
5
2
IN2
3
IN3
4
IN4
5
RET (Common Return for all Inputs)
The inputs are labeled IN1 through IN4 and are followed by a connection labeled
RET for the input signal return. Although there is only one return terminal (RET)
supplied, it is recommended that a separate return wire be used for each input. All
return wires should be crimped into one connection to the RET terminal.
12
Andover Controls Corporation
Wiring Concerns
Do not remotely ground any part of the sensor wiring. Remote grounds connected to
the i2867 return terminal could make the controller operate incorrectly or damage the
equipment. The signal return is not true earth ground. It is an electronic reference
point necessary to interpret the sensor properly.
It is recommended that you run input wiring in a conduit separate from AC power or
output wiring and avoid long wiring runs.
For reliable input operation, follow these input wiring guidelines:
•
Never lay wires across the surface of the printed circuit board.
•
Wires should never be within 1 in. or 25 mm of any component on the printed
circuit board.
•
Use shielded input wire.
•
Terminate the shield of the input wires at one end of the run only, preferably at
the end where your controller is located.
•
Be careful when stripping wire not to drop small pieces of wire inside the cabinet.
•
Don’t run your input wiring in the same conduit with AC power.
•
Don’t run your input wiring in the same conduit with your output wiring.
Caution
Do not externally ground any input connected to the Controller. This may
damage the unit. Signal return terminals are not connected to Earth Ground.
Input Pull-up Resistor Selection
The i2867 inputs may be configured to include internal pull-up resistors. In some
measuring instances it is desirable that there be no pull-up resistor. Instead of
physically removing or cutting the resistor off the printed circuit board, the input
module includes a pull-up resistor selection switch. When the switch is placed in the
‘enabled’ or ON position, the pull-up resistor is connected to the input line. When the
switch is moved to the ‘disabled’ or OFF position, the pull-up resistor is removed from
the circuit. The following is a schematic representation of the switch and its
associated pull-up:
VREF
10K
Switch shown in
‘disabled’ position
INPUT
i2867 Installation & Programming Guide
13
Input Pull-up Resistor Switch Location
The i2867 pull-up selection switch is located inside the plastic case, behind the status
panel. You must remove the front of the case to access the location. To remove the front
of the case, locate the small plastic tabs that hold the case halves together. Depress the
tab on both sides and lift the case back as shown:
While tabs are depressed, lift case backwards
Depress tabs on both sides
Once you have accessed the board, the switch can be found as shown on the following
diagram:
DISABLED
1
2
3
ENABLED
4
PULL-UP RESISTOR
ENABLE SWITCH
14
Andover Controls Corporation
Measuring Temperature (IN1 - IN4)
All four of the i2867 inputs may be configured to sense temperature by configuring the
controller’s inputs appropriately. This is done by setting the Electrical Type to either ACC
Temp (DEG F) or ACC Temp (DEG C). Connect a resistive thermistor sensor to that
input terminal. The following is a schematic representation of the connection:
IN x
Thermistor
RET
One lead connects to a numbered input terminal, the other to a return terminal.
When the input point is configured as a temperature input, the controller utilizes a look-up
table to convert from a voltage reading to a temperature reading in degrees Fahrenheit or
Celsius. To measure temperature, the pull-up resistor switch associated with this
input must be enabled.
Caution
Never apply a voltage to a thermistor—doing so alters the thermistor’s accuracy and
reliability. In fact, it’s a good idea to replace any thermistor that has had any sort of
voltage applied to it.
Maximum Wire Runs for Thermistors
To keep thermistor errors minimal, limit the length of wire runs to the maximum for the
gauge wire you select.
The following two pages include three tables that indicate the maximum length runs for
wires of various gauges to keep errors within certain temperature limits when using
thermistor elements.
i2867 Installation & Programming Guide
15
Wire Gauges and Corresponding Maximum Runs for
Sensing Temperatures Up to 70 °F (21 °C)
Gauge
1/2 °F (.28 °C) Error
1/4 °F (.14 °C) Error
1/10 °F (.06 °C) Error
#14
2.5 mm2
26,700 ft.
8150 m
13,300 ft.
4000 m
5,300 ft.
1600 m
#16
1.5 mm2
16,700 ft.
5120 m
8,300 ft.
2500 m
3,300 ft.
1000 m
#18
1.0 mm2
10,500 ft.
3200 m
5,200 ft.
1600 m
2,100 ft.
640 m
#20
0.5 mm2
6600 ft.
2000 m
3,300 ft.
1000 m
1,300 ft.
400 m
#22
0.35 mm2
4,100 ft.
1250 m
2,000 ft.
600 m
800 ft.
250 m
Wire Gauges and Corresponding Maximum Runs for
Sensing Temperatures Up to 100 °F (38 °C)
16
Gauge
1/2 °F (.28 °C) Error
1/4 °F (.14 °C) Error
1/10 °F (.06 °C) Error
#14
2.5 mm2
12,600 ft.
3800 m
6,300 ft.
1900 m
2,500 ft.
760 m
#16
1.5 mm2
7,900 ft.
2400 m
3,900 ft.
1200 m
1,500 ft.
450 m
#18
1.0 mm2
5,000 ft.
1500 m
2,500 ft.
760 m
1,000 ft.
300 m
#20
0.5 mm2
3,100 ft.
950 m
1,500 ft.
450 m
600 ft.
180 m
#22
0.35 mm2
1,900 ft.
580 m
900 ft.
275 m
300 ft.
90 m
Andover Controls Corporation
Wire Gauges and Corresponding Maximum Runs for
Sensing Temperatures Up to 150 °F (65 °C)
Gauge
1/2 °F (.28 °C) Error
1/4 °F (.14 °C) Error
1/10 °F (.06 °C) Error
#14
2.5 mm2
4,100 ft.
1250 m
2,000 ft.
600 m
800 ft.
240 m
#16
1.5 mm2
2,600 ft.
800 m
1,300 ft.
400 m
500 ft.
150 m
#18
1.0 mm2
1,600 ft.
500 m
800 ft.
240 m
300 ft.
90 m
#20
0.5 mm2
1,000 ft.
300 m
500 ft.
150 m
200 ft.
60 m
#22
0.35 mm2
600 ft.
180 m
300 ft.
90 m
100 ft.
30 m
i2867 Installation & Programming Guide
17
Measuring DC Voltages (IN1 - IN4)
All four inputs may be configured to sense DC voltage by setting the Electrical Type to
Voltage and connecting the input terminals to a DC voltage source within the range of
the module’s input specifications. The following is a schematic representation of the
connection:
IN x
+
V
-
RET
The plus lead connects to the numbered input terminal, the other to a return terminal.
To measure voltage, the pull-up resistor switch associated with this input must be
disabled.
Voltage Input Specifications
Voltage Range
Resolution
Accuracy
Input Impedance
Filtering
Calibration
18
0 to 5.115 V
0.005 V
+/–0.015 V
10KΩ referenced to 5.120 V
Corner Frequency at 30 Hz, – 20db/decade
Permanent (factory)
Andover Controls Corporation
Sensing Contact Closures (Digital) IN1 – IN5
Digital input points are designed to allow the monitoring of contact closures across an
input (contact wired between the input and return). All five inputs can be configured as
Digital Inputs.
IN x
Contact
Closure
RET
To sense a digital input or contact closure, configure an input point with an Electrical
Type of Digital. To sense contact closures, the pull-up resistor switch associated
with this input must be enabled.
Note: When configuring a Digital point, there is a ‘Polarity’ attribute. If this attribute is
enabled, readings are reversed: ‘On’ will occur when the contact is open, and ‘Off’ occurs
when the contact is closed.
i2867 Installation & Programming Guide
19
Counting Pulsing Signals or Contact Closures
Counter inputs are designed to allow the monitoring of digital pulse trains or contact
closures across an input just like digital inputs, but they accumulate a total of those
closures and act like a counter. All four inputs can be configured as Counter Inputs.
Interfacing is similar to a digital input, however, you set the Electrical Type attribute to
Counter instead. To count signals or contact closures, the pull-up resistor switch
associated with this input must be enabled.
When using an input as a counter, you must take into account the frequency of the input
signal being counted. Universal inputs do not allow for very high speed contact counting.
This module allows counting up to a maximum of 4 Hz or 4 contact closures per second.
Minimum Pulse Width
The high period of the signal must be at least 125 milliseconds.
The low period of the signal must be at least 125 milliseconds.
20
Andover Controls Corporation
Output Connections
The i2867 Controllers include 5 Form A Triac outputs that can be used separately or
be configured into Form K Tri-state outputs (2-max) with a free triac output
remaining. Any two consecutive Triac outputs can be configured as a Form K output.
Examples would be (OUT1 and OUT 2), (OUT3 and OUT4), (OUT2 and OUT3) and
(OUT4 and OUT5). The Controller also includes 2 analog outputs.
Note: When used with an Infinity network serviced by an SX8000 workstation,
OUT 1 and OUT2 must be configured as a tri-state output. The SX8000
workstation assumes the i2867 is configured as an Infinet 1 TCX867 and
therefore, these outputs cannot be used as separate triac outputs.
Output terminations are located on a sixteen-position removable screw terminal
connector along the right side of the module.
5
L
4
24V
A
0.17 C
A,
50/6 4VA
0HZ
3
SHL
2
D
1
-
+
INF
IN
PO ET
RT
867
UN
IN1
1
IN2
2
IVE
INP RSAL
UTS
IN3
3
IN4
4
RET
5
Output
Terminations
i2867 Installation & Programming Guide
21
The outputs are grouped in pairs of two connector terminals per channel. Each Triac
digital output presents a normally open single pole set of contacts.
The diagram below indicates where each output number is located in the terminal
block. The Triac outputs are labeled ‘Digital Outputs’.
Connection
22
Description
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
GND
OUT 1
GND
OUT 2
GND
OUT 3
GND
OUT 4
GND
OUT 5
Form A Triac Output
11.
12.
13.
RET
OUT 6
OUT 7
Analog Outputs (0-10V)
14.
15.
16.
RET
IN 5
SPWR
Smart Sensor Bus Interface
Form A Triac Output
Form A Triac Output
Form A Triac Output
Form A Triac Output
Andover Controls Corporation
Digital Outputs (Form A Triacs)
The i2867 includes five Form A Triac outputs. The following is a functional schematic
representation of the connection:
These output contacts operate as a solid state relay. When the output is set to an
‘ON’ state, the contacts close allowing current to flow between the output terminals.
To use the Form A output in your system, configure an output point with an Electrical
Type of Digital.
Output Rating:
Output Accuracy:
Output Protection:
0.5A, 24 VAC, (Cannot switch DC loads)
0.1 sec. for Pulse Width Modulation (PWM) control
RC snubber on each output
Switching Loads with Triacs
Although the Triac-based outputs provided with this unit appear as relay contacts in
the schematics provided, they are actually solid-state switches that have limitations
on the loads they can switch.
AC vs. DC
The first limitation is that they cannot be used with DC loads. A Triac switches AC
only.
Minimum Load Current
The second limitation involves the minimum load current. In order for the Triac to
switch it must have at least 30 ma of holding current from the load. If your load is less
than 30 ma you can induce the required load by connecting a resistor across the
load. Check the current draw specification on your field device, and if it does not
meet this minimum, add a resistor in parallel with the device being driven sized to
achieve the minimum loading. Use the following formulas to determine resistance
and wattage:
Resistance (ohms) =
Voltage
Current
Power (Watts) =
2
(Voltage)
Resistance
i2867 Installation & Programming Guide
23
Tri-State Output
Adjacent outputs of the i2867 Controller module can be configured as Tri-state Triac
outputs. The following is a schematic representation of a Tri-state output:
In this example, Output 1 is the Tri-state output. The second output in a Tri-state pair is
not addressable as a separate output. It is an integral part of the Tri-state circuit for
Output 1.
Configure Output 1 with an Electrical Type of Tri-state.
Combining Form A Outputs as a Tri-State Output
Adjacent output pairs:
OUT1 and OUT2
OUT2 and OUT3
OUT3 and OUT4
OUT4 and OUT5
can be combined to form a standard Tri-state output. The outputs are electrically
connected as shown in the schematic for the built-in Tri-state output.
Configure the output point of the first point of a pair (i.e., OUT3 of the pair OUT3 and
OUT4) with an Electrical Type of Tri-state.
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Analog Voltage Output
The i2867 includes two Analog voltage outputs. Each voltage output is a groundreferenced signal with a range of 0-10VDC. The maximum output current is 5mA (2,000
ohms minimum load resistance). Ensure that the device being connected is either floating
or at the same ground potential as the controller.
Configure the output point with an Electrical Type of Voltage.
Connect the device across the following terminals:
Although there is only one return terminal (RET) supplied, it is recommended that a
separate return wire be used for each output. All return wires should be crimped into one
connection to the RET terminal.
Note: The load resistance (of the external device) must be greater than or equal to 2 KΩ.
i2867 Installation & Programming Guide
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Smart Sensor Bus Interface (IN5 & SPWR)
The Smart Sensor is a room temperature sensor that includes an LCD or LED display
and a 6-button programmable keypad.
The interface between the i2867 and the Smart Sensor Bus consists of three wires
connected to the following positions on the sixteen-terminal output connector located on
the right side of the Controller module:
14
15
16
RET
IN5
SPWR
The i2867 communicates with the display of the Smart Sensor device over a single wire
(the SPWR connection).
The RET line is the return for both the communications line and the internal thermistor.
The IN5 signal is the active lead from the Smart Sensor thermistor and the keypad. It
connects to the IN5 input to the i2867. Temperature readings and keypad activations
from the Smart Sensor are read as Input 5.
Input 5 must be configured as a general Temperature input.
The following illustrates the connection between the two units:
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Andover Controls Corporation
Operation/Programming
The i2867 Controller is a microcomputer that, along with the input and output
circuitry, includes program memory and data memory. The hardware of the i2867
does nothing without being configured and programmed.
Key Concepts
There are many concepts to learn; however, there are a few key ones that you need
to understand before attempting to grasp the others. These key concepts are outlined
below.
Workstation
The user interacts with the system (either Continuum or Infinity) through a personal
computer called the workstation. Workstation software called CyberStation or
SX8000 is used to configure (set-up), program, monitor and operate the system.
Programming
Programs in a BASIC-like language called Plain English are created on the
workstation and downloaded to the controller where they run.
Configuration
The configuration process is where the various settings for the controller are applied.
Configuration information includes such things as the setting of each input type.
Points
The control of equipment requires monitoring individual inputs and actuating
individual outputs. In Infinity and Continuum systems, these discrete entities are
referred to as ‘points’. You’ll see ‘output point’ or ‘input point’ referred to quite often.
In keeping with this tradition, internal places within a controller or workstation’s
memory are also referred to as points. These software-based points may be
temporary storage locations for set points or the memory location where the current
date and time are stored.
Flash Memory
Memory holds configuration data and the programs the controller uses during
operation. Flash Memory is a kind of memory that has the ability to retain its contents
even during a power failure. Flash does not require batteries to retain this
information.
Database
The information that describes the structure and operation of your building is stored
in a software database. The values of each point in the system, the settings for limits,
the configuration of the hardware and more are contained within this software
structure.
The database is the key to the entire system.
i2867 Installation & Programming Guide
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Configuration Process
The controller is shipped from the factory with the operating system firmware preprogrammed into its program memory. This firmware allows the controller to
communicate with a workstation so that it can be further configured and programmed
to meet the requirements of its intended task.
Once the controller is physically installed at your site it must be configured and
programmed. The following information is presented as an overview of the process.
Detailed descriptions of configuration can be found in the Continuum Configurator’s
Guide (for Continuum systems) or the Infinity SX8000 Programmer’s Guide.
After configuration, the new controller will be visible in the database tree shown in the
workstation explorer window. The following screen shot illustrates the new controller
after creation. This particular screen comes from a Continuum workstation:
The i2867 is the controller named “New_controller”. As an Infinet II controller, its icon
is different from an Infinet I controller.
The folders shown beneath the icon are made visible by clicking the small plus
symbol next to the icon. These folders hold other programmable entities within the
controller.
Magic Variables
There are several “magic” variables that are used to set up the operation of the flash
memory. On Continuum systems (v 1.5 or higher), these variables are automatically
created as System Variables. On Infinity systems or earlier Continuum systems,
these variables are manually created numerics.
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Andover Controls Corporation
Controller Memory
Infinet II controllers such as the i2867 have two distinct program memories. One is
dedicated to the lower-level operation of the controller and the other holds userdefined items such as point data and Plain English programs.
Flash Files
The operating system area contains what is known as the controller’s operating
system firmware. This memory is of the flash variety; it requires no power to retain its
information. Periodically, newer versions of the operating system are released. You
can find and download the latest version of the operating system from the Andover
Controls Technical Support web site. These new versions consist of one or more
“flash files”. Workstation software (Continuum CyberStation 1.5 or higher) includes
provisions for you to upload these flash files directly to the controller.
Application Memory
Plain English programs and point data are stored in Application Memory. This
memory is backed up with a battery to guard against power failure. The controller
includes an extra Flash Memory for storing some of the Application data as well. This
Flash Memory can be commanded to store the configuration data contained in the
battery-backed memory as an extra insurance against loss.
Advantages to Having the Application Data Flash Memory
Initially it may seem redundant to include a flash memory along with battery-backed
memory to hold application data. However, it is this redundancy that makes its
addition attractive.
Although it is unlikely that the battery will fail or that the data in that memory will
become corrupted, it is an extra layer of protection for your configuration data to be
able periodically to lock it into flash.
Limitations of Flash Memory?
Flash memory circuits are rated for a maximum of 100,000 write operations. You
would not use flash memory for the main system RAM in your personal computer. Its
inclusion in the controller is for storing completed configurations and a snapshot of
data at a particular time. When used in this manner, the memory should last the
lifetime of the product. To give you an idea of how many operations are available,
consult the following examples:
Write to flash
1 time per day
10 times per day
Number of operations available
274 years
27 years
If you’re really worried about exceeding the maximum number of writes, the controller
includes an automatic software-based “circuit breaker” that warns you every 10,000
write operations.
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Start-up From Power Failure
With so many memory options available to the controller for storing critical data, we
thought it would be equally helpful to provide a few options for retrieving that data
upon start-up from a power down condition.
Although the controller has a default start-up mode, there are two other start-up
sequences that you can choose.
Possible Restart Conditions
The following describes the three types of conditions a controller may encounter
during a restart from a power failure:
Cold Start:
The controller powers up from reset with no user objects or
configuration in place.
Cool Start:
The controller powers up from reset and restores the user
configuration from Flash memory. It is assumed that a configuration
was explicitly saved by the user at some point prior to power down.
Point log data is not restored (with the exception of manual arrays on
setpoints), Plain English programs are started at their beginning, and
user points, whose SetPoint attribute has been set, have their values
restored. Cool start can be thought of as a “self reload”.
Warm Start: The controller powers up from reset with a user configuration in place.
The user configuration is that which was present in the controller and
preserved due to the battery-backed memory when it was reset and/or
power was lost. Point log data is preserved, Plain English programs
are restarted at the same logical line that was being interpreted when
the controller shut down, and all user points have their values restored.
Warm start is functionally similar to an Infinet 1 warm start.
Overview of Available Restart Modes
One of the settings during the controller definition phase of the configuration process
is to determine the power restart mode. The following modes are available:
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ACCWarmStartOnly
The controller, upon recovery from reset, attempts a warm start;
if that fails, proceeds with cold start.
ACCCoolStartOnly
The controller, upon recovery from reset, attempts a cool start; if
that fails, proceeds with cold start.
ACCWarmToCool
The controller, upon recovery from reset, attempts warm start; if that
fails, attempts a cool start; if that fails, proceeds with cold start. This
is the default mode for the controller.
Andover Controls Corporation
Detailed Description of Restart Modes
Warm Start Only
Selected by:
Continuum System Variable: ACCRestartMode = ACCWarmStartOnly
Infinity Numeric:
INFRestartMode = 0
In this mode, after a reset the controller examines the database in its internal RAM,
attempts to correct any data corruption that may have been caused by an untimely
reset/power loss, validates the database and attempts to use it if it is found to be
valid.
•
Point values (with the exception of input points) are restored.
•
Input point values are purged and a fresh sample is obtained from the hardware
before the Scanner runs.
•
Output points are marked for hardware update such that their values will be
refreshed to the hardware upon completion of the Scan (pulsed output values are
assumed to have expired).
•
All log data are retained.
•
Plain English programs, that were running when the system went down, are restarted at the same logical line that was “CurrentLine” when the controller shut
down. The Status, and State attributes are left unchanged. Line start times are
left at whatever value they had when the controller went down and ts, tm, th, td
will be incremented (from whatever value they had before power down) by the
time delta imposed by the first time sync message after warm start. The elapsed
time variables are actually computed values, hence their behavior is a side effect
of the fact that the line start times are left unchanged.
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Cool Start Only
Continuum System Variable: ACCRestartMode = ACCCoolStartOnly
Infinity Numeric:
INFRestartMode = 1
In this mode, the user database is backed-up to the User Backup Area of Flash memory
upon user command only (manually). When the controller powers up after a reset, it
examines the backup area in Flash memory, and if a valid backup is found, the data is
restored to RAM. Certain portions of the data are re-initialized:
•
Point values whose SetPoint attribute are TRUE have their values restored
•
Input point values are purged and a fresh sample obtained from the hardware before
the Scanner runs.
•
Output points are purged.
•
All automatic log data are purged
•
Manual array data are retained for setpoint variables only.
•
The CurrentLine attribute of Plain English programs is set to its first line. The program
is run ONLY if the AutoStart attribute is TRUE. The State attribute is restored and its
value observed.
Warm to Cool
Continuum System Variable: ACCRestartMode = ACCWarmToCool
Infinity Numeric:
INFRestartMode = 2
In this mode, the user database is backed-up to the User Backup Area of Flash memory
only when the user specifically requests a backup. When the controller powers-up after a
reset, it examines the database in RAM, attempts to correct any data corruption that may
have been caused by an untimely reset/power loss, validates the database (against
things like bad pointers etc.) and attempts to use it if it is found to be valid. If this fails, it
examines the User Backup Area of Flash memory, and if a valid backup is found then
data is restored to RAM (cool start).
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Setting the Restart Mode
On Continuum Systems:
When you define the controller using the Continuum CyberStation, a system
variable called ACCRestartMode is automatically created in the controller. Through
the explorer, open the System Variables folder and open the ACCRestartMode
variable.
In the editor window you select the desired mode from the three modes previously
mentioned.
On Infinity Systems:
Defining the controller on an Infinity system using the SX8000 requires you to
manually create a numeric variable: INFRestartMode. After creation you need to
set this variable as follows:
Mode
Set INFRestartMode to:
Warm Start Only
0
Cool Start Only
1
Warm To Cool
2
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Flash Memory Backup Variables and Tools
With the restart mode set to CoolStartOnly or WarmTo Cool, you have the option of
backing up your database to the internal Application Flash Memory. There are
several status variables that can be monitored to determine the current state of the
information in the flash area.
StatusFlash
Indicates the state (empty, full or failure) of the Flash
memory device. In this case “full” indicates that a valid
database is present.
StatusBackup
Indicates the operational state (backup needed, backup
done, backup in progress, etc.) of the memory. It also
includes provisions to initiate a backup operation.
FlashWRCount
Stores a running tally of the number of write operations
performed on the flash memory.
There are two features that prevent loss of operations:
Flash Circuit Breaker
Prevents you from unintentionally performing more write
operations than the flash memory allows.
Automatic Notification of
Backup Needed
Visual indication in the Continuum Explorer of the need to
backup a controller.
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Andover Controls Corporation
Using the StatusFlash Variable
The StatusFlash variable indicates the current state (empty, full or failure) of the
Flash memory device. The controller stores status information into this variable.
On Continuum Systems:
A system variable called ACCStatusFlash is automatically created when the
controller is defined.
ACCStatusFlash can have the following values:
ACCFlashEmpty
There is no valid database in Flash memory
ACCFlashValid
There is a valid database in Flash memory
ACCFlashFailure
An error was encountered while trying to perform a backup
to Flash. In this state, the data in flash is unusable
On Infinity Systems:
A numeric called INFStatusFlash must be manually created prior to its use.
INFStatusFlash can have the following values:
0 (zero)
There is no valid database in Flash memory
1
There is a valid database in Flash memory
2
An error was encountered while trying to perform a backup to
Flash. In this state, the data in flash is unusable
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Using the StatusBackup Variable
The StatusBackup variable indicates the operational state (backup needed, backup
done, backup in progress, etc.) of the memory. It is also used to initiate a backup
operation. The controller stores status information into this variable and the user
initiates a manual backup operation through this variable.
Note: The CyberStation (v 1.5 or higher) user interface includes the ability to
command a flash backup as well as the method presented below.
On Continuum Systems:
A system variable called ACCStatusBackup is automatically created when the
controller is defined.
ACCStatusBackup, when used as an indicator, can have the following values:
ACCBackupDone
A backup to Flash memory has been successfully
completed, or the controller has not been configured.
ACCBackupNeeded
A configuration item has changed value since the last
successful backup to Flash memory.
ACCBackupInProgress A backup to Flash memory operation is underway.
Note: The database is available on a read-only basis
during the backup operation.
ACCBackupDisabled
The database has been saved to Flash memory 10,000
times and the user has attempted further backup
operations without re-setting the Flash Circuit Breaker (see
BackupEnable). For as long as this condition persists,
further backup operations are disabled.
ACCBackupInactive
The system has been placed in WarmStartOnly mode
and therefore, Flash user backup area is not available
for use.
ACCStatusBackup, when used to initiate a backup can have the following values:
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ACCBackupEnable
A command from the user. This allows you to override
the Flash Circuit Breaker and perform further backup
operations. Further backup operations will be uninhibited
until an additional 10,000 Flash write cycles have been
incurred.
ACCBackupNow
A command from the user. This causes the system to
initiate a backup of the current database to Flash
memory.
Andover Controls Corporation
Using the StatusBackup Variable (continued)
On Infinity Systems:
A numeric called INFStatusBackup must be manually created prior to its use.
INFStatusBackup, when used as an indicator can have the following values:
0 (zero)
A backup to Flash memory has been successfully completed.
1
A configuration item has changed value since the last
successful backup to Flash memory.
3
A backup to Flash memory operation is underway.
Note: The database is available on a read-only basis during
the backup operation.
4
The database has been saved to Flash memory 10,000 times
and the user has attempted further backup operations without
re-setting the Flash Circuit Breaker (see BackupEnable). For
as long as this condition persists, further backup operations
are disabled.
6
The system has been placed in WarmStartOnly mode and
therefore, Flash user backup area is not available for use.
IMPORTANT NOTE: You must use the command line to write to the
INFStatusBackup variable. Do not use the editor window in the SX8000,
CyberStation or the terminal interface within a CX to initiate a backup
operation.
INFStatusBackup, when used to initiate a backup can have the following values:
5
A command from the user. This allows you to override the
Flash Circuit Breaker and perform further backup operations.
Further backup operations will be uninhibited until an
additional 10,000 Flash write cycles have been incurred.
2
A command from the user. This causes the system to initiate
a backup of the current database to Flash memory.
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Using the FlashWRCount Variable
The FlashWRCount variable Stores a running tally of the number of write operations
performed on the flash memory. The controller stores the count information into this
variable.
On Continuum Systems:
A system variable called ACCFlashWRCount is automatically created when the
controller is defined.
On Infinity Systems:
A numeric called INFFlashWRCount must be manually created prior to its use.
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I/O Point Assignments
The i2867 can be programmed using the following point assignments:
Function
Input Point Assignment
Input 1
Input 2
Input 3
Input 4
Input 5
Function
1
2
3
4
5
Electrical Type
* see note 1
* see note 1
* see note 1
* see note 1
* see note 2
Output Point Assignment
Electrical Type
Output 1
Output 2
Output 3
Output 4
Output 5
1
2
3
4
5
* see note 3
* see note 3
Digital, Tri-State
Digital, Tri-State
Digital, Tri-State
Output 6
Output 7
6
7
Voltage
Voltage
* Note 1: valid E-Types are:
Voltage
ACC_TEMP_DEGF
ACC_TEMP_DEGC
Digital
Counter
* Note 2: valid E-Types are:
Digital
ACC_TEMP_DEGF
ACC_TEMP_DEGC
* Note 3: valid E-Types are:
When using CyberStation: Digital, Tri-State
When using SX8000: Tri-State only
i2867 Installation & Programming Guide
39
Pre-Operation Checks
1.
Make sure the internal battery is present and the protective tab is removed.
2.
Make sure the 24VAC power is wired properly. Check to be sure that both wires have been
connected.
3.
Make sure the controller has a true earth ground.
4.
Make sure you have used the proper cables and wires at correct lengths.
5.
Make sure the Infinet cables and shields has been properly wired.
Initial Power-Up
1.
Enable the AC power source (or close the power connection). The controller starts
automatically. If the controller has been off, outputs remain off. If you have pressed the
internal RESET button, outputs turn off.
2.
The CPU indicator flashes five times per second during normal operation.
3.
If the CPU indicator flashes two times per second, the CPU has failed an internal test. In this
case, recheck your connections and contact your Andover Controls representative.
Indicators are located on the Access Panel found behind the module door.
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Andover Controls Corporation
Troubleshooting
CPU Indicator Is Not Blinking
If the CPU indicator is not blinking then the unit is not operating. This could be due to
the loss of primary AC power or other internal disfunction.
Check that 24VAC
is available and connected properly to the power terminals.
This can be done using a multimeter reading the voltage across the 24VAC
and
GND
terminals.
If power appears to be OK, remove power and all other connections from the unit.
The fuse within the unit may have failed. To access the fuse the controller housing
itself must be disassembled. The housing consists of two pieces that are snapped
together.
Follow the illustrations below to open the housing and gain access to the fuse area of
the printed circuit board:
Depress tabs found on both
sides of the case
FUSE
Remove the plug-in power fuse component and check it for continuity with an Ohm
meter. If the fuse is blown, replace it with a similar 2 Amp fuse (it resides in a socket).
After replacement, take care re-mounting the cover.
i2867 Installation & Programming Guide
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Unit Appears Functional But Is Not Responding To CX Controller
If the CPU indicator is blinking normally chances are that the unit is operational.
However, in that the i2867 is a programmable unit, it is possible that there is a
programming problem.
Monitoring Infinet Activity
Infinet communications can be monitored simply by observing the status of the TD
(transmit) and RD (receive) LED indicators viewable from the Access Panel. During
Infinet communications, both of these LEDs should show activity.
One Input or Output Appears to Be Dysfunctional
If the CPU indicator is operating and other inputs/outputs are operating properly there
could be two reasons for the failure:
•
The Input or Output has been damaged. In this case contact an Andover
Controls representative for assistance.
•
If this is the first time using the controller, perhaps the program controlling the
input/output is not correct. Re-check your program.
Internal Reset Button
Should the controller appear to be non responsive and all other attempts to revive it
fail, try pressing the Reset button. The button is located behind the Access Panel.
Restart
Switch
behind panel
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Andover Controls Corporation
To access the button, the module cover must be opened and the electronics access
cover must be removed. The access cover is secured via two force fitting plastic
tabs. To remove the access cover after the main cover is opened, gently pry the
cover outward using your thumb and forefinger while lifting the cover. As shown
below:
i2867 Installation & Programming Guide
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Andover Controls Corporation
I2867 Installation & Programming Guide
30-3001-796
i2867 Installation & Programming Guide Rev B
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