HA71 Digital Gas Controller
Technical Manual
TO• C
General Descriptio• n
Basic Operatio• n
Main I/O Interfac• e PCB
System Diagnostic• s
Modbus•
®
RS485 Ports
HA71 Enclosure• s
Ordering Informatio• n
Warrant• y
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual i
Important Safety Issues
The following symbols are used in this manual to alert the user of
important instrument operating issues:
This symbol is intended to alert the user to hazards or
unsafe practices which could result in severe personal
injury or death.
This symbol is intended to alert the user to the presence
of important operating and maintenance (servicing)
instructions.
This symbol is intended to alert the user to the presence
of dangerous voltage within the instrument enclosure that
may be sufcient magnitude to constitute a risk of electric
shock.
WARNINGS:
Shock Hazard - Disconnect or turn off power before servicing •
this instrument.
NEMA 4X wall mount models should be tted with a locking •
mechanism after installation to prevent access to high voltages
by unauthorized personnel (see Figure 6-2).
Only the combustible monitor portions of this instrument •
have been assessed by CSA for C22.2 No. 152 performance
requirements.
This equipment is suitable for use in Class I, Division 2, Groups •
A,B,C and D or non-hazardous locations only.
Use a properly rated CERTIFIED AC power (mains) cable installed •
as per local or national codes
A certied AC power (mains) disconnect or circuit breaker should •
be mounted near the controller and installed following applicable
local and national codes. If a switch is used instead of a circuit
breaker, a properly rate CERTIFIED fuse or current limiter is
required to installed as per local or national codes. Markings
for positions of the switch or breaker should state (I) for on and
(O) for off.
Clean only with a damp cloth without solvents.•
Equipment not used as prescribed within this manual may impair •
overall safety.
WARNING
Explosion hazard- substitution of components may impair suitability
for Class I, Division 2.
WARNING
Explosion hazard- do not replace fuse unless power has been switched
off or the area is known to be non-hazardous.
WARNING
Explosion hazard- do not disconnect equipment unless power has
been switched off or the area is known to be non-hazardous.
Modbus® is a Registered Trademark of Schneider Electric
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual ii
Table of Contents
1 General Description
1.0 General Description ................................................. 1-2
1.1 Data Display Screens ......................................... 1-2
1.1.1 Trend Screen ................................................ 1-2
1.1.2 Bar Graphs Screen ...................................... 1-3
1.1.3 Combination Screen ....................................1-3
1.2 Specifications ..................................................... 1-3
1.2.1 DC Power Supply Requirements ................. 1-3
1.2.2 150 Watt AC – 24VDC Power Supply .......... 1-3
1.2.3 Relays ..........................................................1-4
1.2.4 Ambient Temperature Range ....................... 1-4
1.2.5 Humidity Range ...........................................1-4
1.2.6 Altitude .........................................................1-4
1.2.7 Housings ......................................................1-4
1.2.8 Non-Intrusive Magnetic Keypad ................... 1-4
1.2.9 Approvals .....................................................1-4
2 Basic Operation
2.0 Basic Operation ........................................................ 2-2
2.1 Setup Menu Configuration ................................. 2-2
2.1.1 Changing Menu Variables Using the Ke ypad .. 2-2
2.2 Channel Configuration Menus ........................... 2-3
2.2.1 Channel Setup Entry Menu .......................... 2-3
2.2.2 Alarm 1 / Alarm 2 / Horn Relay Set-Up Menu . 2-3
2.2.3 Alarm 3 / Fault Alarm Menu ......................... 2-4
2.2.4 Data From? Menu to Set Input Source ........ 2-4
2.2.5 MIN/MAX Raw Counts Menu ....................... 2-5
2.2.6 Marker Menus .............................................. 2-6
2.2.7 Linearization Menu ...................................... 2-6
2.2.8 Configure Menu ...........................................2-6
2.2.9 Eunits / Measurement Name ASCII Data Fields . 2-6
2.2.10 Input Measurement Range ........................2-7
2.2.11 Decimal Point Resolution ........................... 2-7
2.2.12 Turning off Unused Channels ..................... 2-7
2.2.13 Copy Data To? ........................................... 2-7
2.2.14 CAL Mode .................................................. 2-7
2.3 System Configuration Menus ............................ 2-8
2.3.1 Common Alarm Relays 1 and 2 ................... 2-9
2.3.2 10-0195 Discrete Relay “Failsafe” Mode .... 2-10
2.3.3 Common Horn Relay and Local Piezo ....... 2-10
2.3.4 Modbus
®
Master / Slave Serial P ort Menus . 2-11
2.3.4 Eight / Sixteen Channel Modes ................. 2-11
2.4 Authorization Mode .......................................... 2-12
2.5 LCD Contrast Adjustment ................................ 2-12
3 Main I/O Interface PCB
3.0 Main I/O Interface PCB ............................................. 3-2
3.1 Input / Output Optional PCBs ............................ 3-3
3.1.1 Optional Analog Input PCB .......................... 3-3
3.1.2 Optional Discrete Relay PCB ....................... 3-4
3.1.3 Optional *Bridge Sensor Input Board ........... 3-5
3.1.4 Catalytic Bead Sensor Initial Setup ............. 3-5
3.1.5 Optional RTD / 4-20mA Analog Input Board .. 3-7
3.1.6 Optional 4-20mA Analog Output Board ......3-8
HA71 Digital Gas Controller
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HA71 Technical Manual iii
3.1.7 Optional Clock/Printer Interface Board ........3-9
3.1.8 Clock / Printer System Set-Up Menu ......... 3-10
3.1.9 Optional 24VDC 150 W att Power Supplies .. 3-10
4 System Diagnostics
4.0 System Diagnostics ................................................. 4-2
5 Modbus
®
RS-485 Ports
5.0 Modbus
®
RS-485 Ports ............................................. 5-2
5.1 Modbus
®
Slave Register Locations ................... 5-2
6 HA71 Enclosures
6.0 HA71 Enclosures ...................................................... 6-2
6.1 HA71PM Panel / Rack Mount Enclosure ........... 6-2
6.2 HA71N4 NEMA 4X Fiberglass Wall Mount Encl . 6-3
6.3 HA71SS NEMA 4X 316 Stainless Steel Wall Mount Encl . 6-5
6.4 HA71XP NEMA 7 Explosion-Proof W all Mount Encl . 6-6
6.5 HA71 Main I/O and Option PCB Footprint
Dimensions ..................................................................... 6-7
A Ordering Information
A Ordering Information ..................................................A-2
B Warranty
Honeywell Analytics Warranty Statement ....................B-2
Table of Contents
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 1-1
1 General Description
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 1-2
1.0 General Description
The Honeywell Analytics HA71 Sixteen Channel Controller is designed
to display and control alarm event switching for up to sixteen sensor
data points. It may also be set as an eight channel controller for
applications needing fewer inputs. Alarm features such as ON and
OFF delays, Alarm Acknowledge, and a dedicated horn relay make
the HA71 well suited for many multi-point monitoring applications. Data
may be input to the HA71 by optional analog inputs or the standard
Modbus
®
RTU master RS-485 port. A Modbus® RTU slave RS-485
port is also standard for sending data to PC’s, PLC’s, DCS’s, or even
other HA71 Controllers. Options such as analog I/O and discrete relays
for each alarm are easily added to the
addressable I2C bus. Option boards
have 8 channels and therefore require
2 boards for 16 channel applications.
A 240 x 128 pixel graphic LCD readout
displays monitored data as bar graphs,
trends and engineering units. System
configuration is through user friendly
menus and all configuration data is retained in non-volatile memory
during power interruptions. The HA71 front panel is shown below in
Figure 1.0 displaying the 8 channel bar graph screen.
1.1 Data Display Screens
The HA71 Controller offers 3 distinct graphic displays for depicting
the monitored data:
Bar Graphs•
24 Hour Trend•
Combination. •
1.1.1 Trend Screen
The HA71 Trend screen shown in Figure 1-2,displays a 24 hour trend
of input data for the channel selected. Horizontal tic marks are each
hour and vertical tic marks are each 10% of full scale. Dashed lines
indicate alarm levels. The graphic
LCD is 240 pixels wide so each pixel
represents 1/10 hour, or 6 minutes
worth of data. The trend is 100 pixels
high so each represents 1% of full
scale in amplitude. Since each data
point must be collected for 6 minutes
before it may be displayed, it is likely
input values will fluctuate during this
interval. Therefore, MAX, MIN and AVERAGE values are stored in
RAM memory for each 6 minute subinterval. To accurately portray the
trend, a vertical line is drawn between MIN and MAX values for each
6 minute subinterval. The AVERAGE value pixel is then left blank,
leaving a gap in the vertical line. This is demonstrated in the noisy
area of the 24 hour trend in Figure 1-2. If the MAX and MIN values are
within 2% of each other there is no need for the vertical line and only
the AVERAGE value pixel is darkened as in the quiet areas.
The top portion of each trend screen indicates channel #, real time
reading in engineering units, measurement name, range, and MIN,
MAX and AVERAGE values for the preceding 24 hour period. The SI
field on the top right indicates number of seconds remaining in the
current 6 minute subinterval.
HA71 Digital Gas Controller
Range =
24Hr Data 0 Min80 Max30 Avg
0 to 100 PCTLEL SI 125
Ch05 Measurement Name 50 PCTLEL
Figure 1-2. Trend Screen
HA71 Digital Gas Controller
Ch01
Ch02
Ch03
Ch04
Ch05
Ch06
Ch07
Ch08
0PCTLEL
10 PCTLEL
0PCTLEL
50 PCTLEL
0PCTLEL
0PCTLEL
0PCTLEL
0PCTLEL
12345678
Figure 1-1. HA71 Front Panel
HA71 Digital Gas Controller
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HA71 Technical Manual 1-3
1.1.2 Bar Graphs Screen
The HA71 Bar Graphs screen shown in Figure 1-3 allows all active
channels to be viewed simultaneously. Both engineering units values
and bar graph values are indicated
in real time. Lines across the bars
indicate the alarm trip points making
it easy to identify channels at or near
alarm. A feature in the Systems menu
tree allows new alarms to always
force the LCD to the bar graphs
screen. This is useful for applications
requiring channels with alarms to be
displayed.
1.1.3 Combination Screen
The HA71 Combination screen shown in Figure 1-4 offers a view of a
single channel but displays the data as a 10 minute trend, bar graph
and large engineering units. It is also useful for testing inputs for
stability since MAX, MIN and AVERAGE values refresh each time this
screen is selected. For example, to
test stability over a one hour period for
an input, begin timing as soon as the
channel is selected. One hour later
record the MAX, MIN and AVERAGE
values. The difference between MAX
and MIN indicates peak to peak
excursions over the one hour period
and AVERAGE is the average for the
hour. Longer or shorter tests may
also be run. The numeric value shown below the bar-graph indicates
number of minutes samples have been taken. After 999 minutes the
AVERAGE buffer overflows and the error message UPDATE appears
in the AVERAGE field. Exiting this screen resets the buffer and clears
the error message.
1.2 Specifications
1.2.1 DC Power Supply Requirements
Standard HA71 power requirements are 10-30VDC @ 3 watts applied
to terminals 9 & 11 of TB2 on the standard I/O PCB (see Section 3.0).
Optional features increase power consumption as described below:
Discrete Relay PCB option; add 2 watts per PCB.•
Analog Input PCB option; add 1/2 watt.•
4-20mA Output PCB option; add 1 watt.•
Catalytic Bead Sensor Input option; add 12 watts max (depends •
upon sensor power).
TB2 terminals 10 & 12 of the standard I/O PCB provide a •
maximum of 500mA fused output power for powering of auxiliary
external devices such as relays, lamps or transmitters. Power
consumed from these terminals should be considered when
calculating system power consumption.
1.2.2 150 Watt AC – 24VDC Power Supply
110-120 VAC @3.2A max•
220-240VAC @ 1.6A max•
A slide switch on the front of the power supply selects AC input •
range.
The 10-0172 150 watt power supply (Section 3.1.9) is for powering
the HA71 and up to 16 detectors. A minimum of 5 watts per channel
is available for powering of external transmitters.
HA71 Digital Gas Controller
Ch01
Ch02
Ch03
Ch04
Ch05
Ch06
Ch07
Ch08
0PCTLEL
10 PCTLEL
0PCTLEL
50 PCTLEL
0PCTLEL
0PCTLEL
0PCTLEL
0PCTLEL
12345678
Figure 1-3. Bar Graphs Screen
HA71 Digital Gas Controller
10 MINUTES
Ch02 Measurement Name
01117 COUNTS
MAX
MIN
AVG
SPAN
ZERO
%FS
03
PCTLEL
10
0
3
100
0
Figure 1-4. Combination Screen
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 1-4
1.2.3 Relays
Common relays are standard for ALARM 1, ALARM 2, FAULT and
HORN. Discrete relays are optional. All relays are rated at 5 Amp for
28 VDC and 250 ~VAC RESISTIVE loads.
CAutIoN
Appropriate diode (DC loads) or MOV (AC loads) snubber devices
must be installed with inductive loads to prevent RFI noise spikes.
Relay wiring should be kept separate from low level signal wiring.
1.2.4 Ambient Temperature Range
-25 to 50 degrees C
1.2.5 Humidity Range
0 TO 90% R. H. Non-Condensing.
1.2.6 Altitude
Recommended up to 2000 meters
1.2.7 Housings
General purpose panel mount weighing 7 lbs and including •
hardware for 19” rack mounting (Figure 6-1).
*NEMA 4X wall mount in fiberglass enclosure weighing 17 lbs •
(Figure 6-2).
*NEMA 4X wall mount enclosure in 316 stainless steel weighing •
30 lbs (Figure 6-4).
*NEMA 7 wall mount suitable for DIV 1&2 Groups B,C,D •
weighing 110 lbs (Figure 6-5).
*Includes non-intrusive magnetic keypad.
1.2.8 Non-Intrusive Magnetic Keypad
The HA71 operator interface includes five front panel touch keys. A
magnetic keypad option offers these five keys with adjacent magnetic
keys. This option is included as a standard item when ordering NEMA
4X weather resistant or NEMA 7 explosion-proof enclosures. It is useful
in applications where it may be inconvenient to open the enclosure’s
door to access the touch keypad.
1.2.9 Approvals
CSA C22.2 No 1010.1 and ISA S82.02•
CSA C22.2 No 152 for combustibles•
UL 1604 / C22.2 No 213 (Div 2 Groups A,B,C,D)•
EN55011 & EN61000 (CE Mark).•
CSA File # = 219995 and may be seen at:•
www.CSA- International.org.
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 2-1
2 Basic Operation
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 2-2
2.0 Basic Operation
The HA71 offers 3 graphic screens for viewing monitored data and
a Set-Up menu screen for operator interface to configuration menus.
They are shown below in Figure 2-1. The Bar Graphs screen allows
viewing of all active channels simultaneously. The Trend screen
displays a 24 hour trend one channel at a time. The Combination screen
displays a bar graph, large engineering units and a 10 minute trend one
channel at a time. Input channels may be displayed in sequence with
the UP/DOWN keys. The NEXT key switches between the 3 graphic
data screens. When HA71 power is applied, the graphic LCD returns
to the screen active when power was last removed.
Setup menus are entered by pressing EDIT from any data screen,
and scrolling to the desired menu using the UP/DOWN keys. Pressing
EDIT again enters the selected menu’s tree of variables. This Setup
mode may be exited manually by pressing NEXT, or automatically
when no keys are pressed for 5 minutes. Alarm relays and front
panel alarm LED indicators remain active during the Setup mode. An
AUTHORIZE menu offers a password feature to prevent tampering
with HA71 parameters.
Ch01
Ch02
Ch03
Ch04
Ch05
Ch06
Ch07
Ch08
0PCTLEL
10 PCTLEL
0PCTLEL
50 PCTLEL
0PCTLEL
0PCTLEL
0PCTLEL
0PCTLEL
12345678
10 MINUTES
Ch02 Measurement Name
01117 COUNTS
MAX
MIN
AVG
SPAN
ZERO
%FS
03
PCTLEL
10
0
3
100
0
Bar Graphs Combination
Range =
24Hr Data 0 Min80 Max30 Avg
0 to 100 PCTLEL SI 125
Ch05 Measurement Name 50 PCTLEL
System
Contrast
Authorize
Channel 0
Channel 02
Channel 03
Channel 04
Channel 05
Channel 06
Channel 07
Channel 08
Channel 09
Channel 10
Channel 11
Channel 12
Channel 13
Channel 14
Channel 15
Channel 16
UNLOCKED
SETUP MENU
1
Diagnostics
Trend Setup
Figure 2-1. HA71 Graphic Screens
2.1 Setup Menu Configuration
Variables inside system and channel menu trees allow optimum HA71
configuration for a wide range of demanding multi-point monitoring
applications. Access to menus is via the Setup mode by pressing
EDIT and activating the Setup screen shown in Figure 2-1. Menu
trees are provided for each of the 16 channels and another for system
variables. Select the desired menu by scrolling with UP/DOWN and
EDIT to enter the menus.
2.1.1 Changing Menu Variables Using the Keypad
Upon entering a menu, a pointer controlled by the UP/DOWN keys
indicates the selected variable. Some are simple YES/NO or ON/OFF
entries toggled by pressing the EDIT k ey. Others , such as Measurement
Name and Eunits fields may have many ASCII character possibilities.
Allowed ASCII characters are as follows:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
BLANK SPACE
!”#$%&`()*+-./:;<=>?@
0123456789
EDIT places a cursor over the item and UP/DOWN scrolls through
each allowed entry. The NEXT key moves the cursor to the next
position within a field. When the field is complete, EDIT clears the
cursor and loads it into non-volatile memory where it is retained
indefinitely. With no cursor present, NEXT closes open menus in
reverse order and returns the LCD to the most recent data display.
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 2-3
2.2 Channel Configuration Menus
Figure 2-2 illustrates the menu tree for configuring Channel variables.
These items affect only the specific channel selected. System specific
variables are in the menu tree shown in Section 2.3.
Entry menu
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Calibrate
Linearize
Configure
Input / Copy To: menu
Channel XX
CONFIGURATION
Measurement Name
Eunits
Zero
Span
Decimal Points
6digit
0.000
Copy Now?
100.0
If for A3 level
Channel XX
ALARM 3 SETUP
Setpoint 60.00
Latching
Trip On
On Delay
Off Delay
NO
HIGH
00s
00m
Type LEVEL
Channel XX
ALARM 3 SETUP
Setpoint -5.000
Type
FAULT
Input From?: menu
Channel XX
INPUT DATA FROM
Min Raw
Max Raw
Sensor Direct
04000
00800
If input is Modbus
Channel XX
INPUT DATA FR OM
MODBUS 8 BIT
Min Raw
MaxRaw 00250
00050
Remote ID
Alias33001
01
Linearization menu
Channel XX
Linearization
%Input
%Output
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
Channel On?0YES
Alarm 3 / Fault menu
If input is sensor
Channel XX
CALIBRATION
Cal ZERO
Cal SPAN
Set Zero
Set Span
50.00
0.000
Unity Gain
Copy To XX
Alarm 1 or 2 menu
Channel XX
ALARM # Setup
Setpoint 20.00
Latching
Trip On
On Delay
Off Delay
NO
HIGH
00s
00m
Horn DriveYES
2.2.1 Channel Setup Entry Menu
The entry menu shown on the left side of Figure 2-2 allows access to
all configuration variables for the selected channel. These are, Alarm
1, Alarm 2, Alarm 3, Data From? Linearize, Input and Calibrate.
2.2.2 Alarm 1 / Alarm 2 / Horn Relay Set-Up Menu
Alarms 1 and 2 are identical except A1 may not be acknowledged
and front panel LED indicators are yellow while A2’s are red. Since
their configuration menus are the same only one is shown in Figure
2-3 for clarity.
Alarm 1 or 2 menu
Channel XX
ALARM # Setup
Setpoint 20.00
Latching
Trip On
On Delay
Off Delay
NO
HIGH
00s
00m
Horn DriveYES
Entry menu
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Calibrate
Linearize
Input
EDIT
NEXT
Figure 2-3. Alarm and Horn Relay Setup Menu
The first entry determines the Setpoint value where the alarm trips.
It is entered in engineering units. For example, if a channel monitors
0-50 ppm H2S and the alarm must trip at 10 ppm, the correct entry
is 10.00.
Latching• determines either manual or automatic alarm reset
operation. YES requires a manual Alarm Reset to unlatch the
alarm e ven though an alarm condition no longer exists. YES also
causes this alarm group’s common relay, front panel LED, and
optional discrete relay to latch. NO allo ws all outputs for this alarm
to automatically reset as soon as the alarm condition clears.
TRIP ON• is set to HIGH for increasing alarms or LOW for
decreasing alarms to determine if the alarm activates upon
exceeding or falling below the setpoint.
Figure 2-2. Channel Menu Tree
HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 2-4
The • ON DELAY / OFF DELAY entries allow ON and OFF time
delays affecting how long the setpoint must be surpassed before
an alarm event transition occurs. ON delays are limited to 10
seconds while OFF delays may be as long as 120 minutes.
Delays are useful in many applications to prevent nuisance
alarms and unwanted cycling into and out of alarm conditions.
The • HORN ON entry allows linking this alarm to the common
horn relay. NO causes the alarm to have no effect upon the horn
relay. Entering YES causes this alarm to turn the horn relay on
steady, or, to pulse it depending upon horn configuration in the
system menu (see Section 2.3.1).
Discrete LED indicators on the front panel indicate the status of each
alarm and relay. Any new alarm event causes the associated LED to
flash until Alarm Reset occurs causing an acknowledged steady on
condition. Operators should recognize new alarms by a flashing LED.
Alarm Reset also acknowledges, or deactivates, the horn relay until
another new alarm occurs.
CAutIoN
All relays are rated at 5 Amp for 28 VDC and 250 ~VAC RESISTIVE loads.
IMPORTANT: Appropriate diode (DC loads) or MOV (AC loads) snubber
devices must be installed with inductive loads to prevent RFI noise
spikes. Relay wiring should be kept separate from low level signal wiring.
2.2.3 Alarm 3 / Fault Alarm Menu
The discrete channel alar ms identified as Alarm 3/Fault may be
configured either as a 3rd level alarm, or, as a Fault alarm indicating
the input is out of range in the negative direction. When used as a
level alarm, features such as on / off delays, latching, and trip direction
are also available. It is important to understand that though discrete
channel alarms (LED’s & optional discrete relays) may be set as Alarm
3 level alarms, the common relay for this group is always a Fault alarm.
The fault out of r ange threshold for the channel is the most recent Fault
trip point entered prior to changing the menu to Alarm 3. The following
example describes how to configure both the Fault out of range and
Alarm 3 level trip points for a channel.
Example: If the common Fault relay must trip as the input falls below
negative 10% of full scale, and, the discrete alarms trip as the input
exceeds a level, then the –10% Fault setpoint must be entered first.
Toggle the TYPE menu entry to FAULT and enter –10.00% into the
setpoint entry. Next, toggle the menu back to LEVEL and enter the
desired Alarm 3 level setpoint. The Fault value is retained in memory
even though it no longer appears on the menu.
Channel XX
FAULT Setup
Setpoint -5.000
Type
FAULT
Alarm 3 / Fault menu
If for A3 level
Channel XX
ALARM 3 Setup
Setpoint 60.00
Latching
Trip On
On Delay
Off Delay
NO
HIGH
00s
00m
Type LEVEL
Entry menu
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Calibrate
Linearize
Configure
EDIT
NEXT
Figure 2-4. Alarm / Fault Alarm Menu
2.2.4 Data From? Menu to Set Input Source
Each channel may be independently configured to accept input data
from the Modbus RS-485 master port or, from an analog input card
attached to the I
2
C bus (see Figure 2-5). EDIT toggles the Data From:
entry between Modbus RTU, Analog, Analog with Local Cal or Sensor
Direct. There are eight different Modbus possibilities available to
accommodate the binary resolution and format of the input data (see
Figure 2-5). Each Modbus menu selection also requests the RTU # and
the Alias register # location of the data to be retrieved from the RTU.
Alias register numbers define the location of the variable representing
the input value and must be obtained from the manufacturer of the
Modbus RTU device.
HA71 Digital Gas Controller
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HA71 Technical Manual 2-5
Analog should be selected when the channel’s input comes from a
transmitter or monitoring device with a calibrated output such as
4-20mA. Analog with Local Cal is available when the HA71 will be
the point of calibration for the analog input. Sensor Direct is identical
to Analog with Local Cal and both activate the HA71’s Cal Mode
features (see Section 2.2.14). Problems may arise if calibrations are
performed in two places upon the same signal so Cal Mode menus are
only visible when Sensor Direct or Analog with Local Cal is selected.
These selections should only be used when the input originates from
a non-calibrated signal source such as the Catalytic Bead Sensor
Input option described in section 3.1.3. This application requires the
HA71 to be used as the calibration point since the sensors have no
zero or span controls.
12-Bit Analog Inputs may be
direct from Sensor Input options
or Voltage/Current Input options
The Modbus Master RS-485
port supports eight integer types,
resolutions and formats.
Figure 2-5. Data From? Menu
2.2.5 MIN/MAX Raw Counts Menu
The Min Raw and Max Raw counts entries included in the Input Data
From: menu define the range of input counts that provide Measurement
Range read out values described in Section 2.2.10. This menu entry
is determined by the A/D converter resolution of the channel’s input.
For example, if the input is a 10 bit Modbus
®
device with zero at 200
counts and 100% at 1000 counts, then this menu’s MIN should be set
at 200 and MAX at 1000. If communicating with the HA71’s optional
12 bit Analog Input PCB the MIN should be 800 and the MAX 4000.
If the input device’s resolution is unknown, the live counts variable
on the bottom of the screen displays actual raw A/D counts currently
being read by this channel. This reading may be used to test the input
device for what A/D counts are provided for zero and 100% if these
values are unknown. Forcing the input device to
read zero should provide the A/D counts value
needed to make this channel’s display also
read zero. Likewise, forcing the input device to
read 100% should provide the A/D counts value
needed to make the HA71 channel’s display also
read 100%.
If Modbus
®
32 BIT is selected, a Byte Order
entry appears at the bottom of the menu. This
determines WORD and BYTE alignment of data at
the remote Modbus
®
transmitter when sending it’s
4 byte IEEE Floating Point values. With the pointer
on this entry, the EDIT key toggles between the
4 possible modes. Min / Max Raw values are not
used in this mode.
Note
Each Data From: item has a matching default MIN/MAX counts
value of 20% to 100% with ± 5% over/underrange applied. If the
default value is incorrect for the input device it should be edited.
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2.2.6 Marker Menus
Some transmitters or monitoring devices providing HA71 inputs also
indicate special modes of operation, such as Calibration, Maintenance
or Fault, by transmitting a special <4mA or negative “Marker” value.
The HA71 offers channel Marker menus for detecting and indicating
such events (see Figure 2-6). While activ e, the HA71 displays a 6-digit
ASCII message to indicate the special event and if equipped with
10-0167 4-20mA output option, the HA71 also transmits the same
<4mA value.
Marker Enabled • turns the marker feature ON and OFF
The negative Marker value is entered into the • Marker % field
as a negative percent of full scale. For example, -15.62% of
full scale detects a marker value of 1.5mA (1.5mA is -15.62%
of full scale when 4-20mA is the range).
The • Mark As menu allows user entry of the 6-digit ASCII
message to be displayed when the marker is detected.
Figure 2-6. Marker Menus
2.2.7 Linearization Menu
The linearization menu allows each channel to have it’s own
linearization curve stored in the controller’s non-volatile memory. Input
versus output points must be entered in percent of full scale values.
This means if the range is 0-200 ppm H2S then 100 ppm is 50% of full
scale. Zero input will provide a zero output and 100% input a 100%
output. Nine intermediate points may be entered to define the curve.
EDIT
NEXT
Entry menu
Channel XX
Measurement Name
Linearization menu
Channel XX
Linearization
%Input
%Output
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
Alarm 1
Alarm 2
Alarm 3
Data From
Calibrate
Linearize
Configure
Figure 2-6. Linearization Menu
2.2.8 Configure Menu
From the entry level setup menu in Figure 2-7 the CONFIGURE
menu may be entered for setting variables defining how the controller
presents monitored data to the various graphic displays.
Entry menu
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Calibrate
Linearize
Configure
EDIT
NEXT
Input / Copy To: menu
Channel XX
CONFIGURATION
Measurement Name
Eunits
Zero
Span
Decimal Points
PCTLEL
0.000
Copy Now?
100.0
Channel On?0YES
Copy To XX
Figure 2-7. Congure Menu
2.2.9 Eunits / Measurement Name ASCII Data Fields
The first two items in this menu are for entering the 6 character
engineering unit and 16 character Measurement Name ASCII fields.
Eunits should define the units of measure for what this channel is to
display. Measurement Name should describe the source of this data
in the user’s terminology. Section 2.1.1 of this manual describes how
to use the front keypad to modify these fields.
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2.2.10 Input Measurement Range
The ZERO / SPAN entries allow configuration of the measurement
range displayed by this channel. Measurement Range works along
with A/D Counts menus, described in Section 2 . 2.5, to define
the range of the input signal’s engineering units. For example, if a
channel’s input is 4-20mA from a transmitter monitoring 0 to 10 ppm
chlorine, then the Zero value should equal 0.000 and the Span value
equal 10.00. The six ASCII engineering units previously entered are
automatically displayed at the top of each menu as a reminder. Four
digits must appear in this entry so trailing 0’s may appear here that
are not displayed on other data screens.
2.2.11 Decimal Point Resolution
Resolution of displayed channel values is configured in this menu by
setting the number digits trailing the decimal point. Values are limited to
a maximum of four digits, and a polarity sign. An auto-ranging feature
displays the highest resolution allowed by this menu’s decimal point
entry. For example, if three decimal points are entered, and the range
is 0 to 100 ppm, the reading will be 0.000 at 0 ppm and 100.0 at 100
ppm. However, this may be undesirable due to the high resolution at
zero unless the sensor’s output is extremely stable. If decimal points
are limited to one, the 0 ppm reading becomes 0.0 and the 100 ppm
reading remains 100.0. Resolution may be limited further by setting
decimal points to 0. In this example, this would cause 0 ppm to display
0 and 100 ppm to display 100.
2.2.12 Turning off Unused Channels
The Channel On? entry determines if this channel is to be utilized.
Turning it off will cause the controller to never process inputs applied
to this channel and no alarms will be tripped or data displayed. Inactive
channels have a line drawn through them on the Setup screen as
indicated by channels 15 & 16 in Figure 2-1. If less than 9 channels are
to be activated, the HA71 may be set for 8 channel mode, deactivating
channels 9-16. This is done in the System Setup menu described in
Section 2.3. The HA71 will only allow 15 channels to be turned off;
at least one channel must remain on.
2.2.13 Copy Data To?
This menu simplifies the Setup procedure by allowing similar channels
to be copied from one to another. For example, if all channels are
identical except for the Measurement Name entry, channel 1 could be
configured and copied to channels 2 – 16. Only Measurement Name
then must be configured on channels 2 – 16. Use EDIT to increment
channel numbers and UP/DN to point to Copy Now? Press EDIT
once more to copy.
2.2.14 CAL Mode
CAutIoN
Each channel’s CALIBRATION menu is inactive unless its Input Data
From: menu, described in Section 2.2.4, is set for Analog with Local
Cal or Sensor Direct. HA71 CAL MODE features allows pushbutton
calibration of zero and span values. This feature should be utilized
only when there are no other zero/span controls within the monitoring
system since it is inappropriate to calibrate a signal at more than one
point. Therefore, if calibration is to be performed at another transmitter
or monitoring device, the HA71 CAL MODE feature should not be used.
The CALIBRATION MENU allows entering the correct Cal ZERO &
Cal SPAN setpoint values needed to calibrate the sensor. These are
entered in the same engineering units as input range. Set Zero & Set
Span controls in this menu allow pushbutton calibration by moving
the pointer to each and pressing the EDIT key. A live reading of the
channel’s value allows calibration checks to see if an adjustment is
needed. Unintentional calibrations are reset by the Unity Gain menu
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item. Unity Gain resets zero offset to 0 and span gain to 1. It is useful
for returning the calibration to a known starting place. Sensor aging
may be monitored by recording zero and span readings at Unity Gain
when it is new, and again at later dates when degradation may have
occurred.
To check zero calibration, apply the ZERO calibration value to the
sensor and observe the live reading. If the zero reading differs from
the zero setpoint, a calibration is needed. To calibrate zero, move the
pointer to Set Zero and press EDIT. A warning message explains
that pressing EDIT again will change the zero calibration and any
other key will exit. The procedure for span calibration is identical. For
example, if an LEL combustible sensor is to be spanned with 50%
LEL span gas, the span set-point must be 50%. If 45% LEL is to be
used later, the span set-point must be changed to 45% to match the
span calibration gas. If the reading is only 40% LEL with the 50% gas
applied a span calibration is needed. Move the pointer to the Set Span
entry and press EDIT twice. Unity Gain may be used at anytime to
cancel incorrect calibrations and start again.
Entry menu
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Calibrate
Linearize
Configure
EDIT
NEXT
If input is sensor
Channel XX
CALIBRATION
Cal ZERO
Cal SPAN
Set Zero
Set Span
50.00
0.000
Unity Gain
Figure 2-8. Calibration Menu
2.3 System Configuration Menus
Some items needing configuration are not specific to a channel but
affect the entire HA71 system.
These are located in the system
entry menu shown on the left side
of Figure 2-9. System menus are
accessed by pointing to the desired
item and pressing EDIT.
Figure 2-9. System Conguration Menus
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2.3.1 Common Alarm Relays 1 and 2
CAutIoN
Read this section carefully and test all settings by simulating HA71
input conditions that should activate these alarm relays!
Common Relay 1 and Common Relay 2 menus are identical and
therefore discussed only once. It is very important to fully understand
these menus since they determine the functions of each common
relay.
Figure 2-10. Common Relay 1 and Common Relay 2 Menu
The • Group menu entry offers additional flexibility by controlling
which channels trip this menu’s common alarm relay. The 3
choices are 1-16, 1-8 or 9-16. Some applications have different
types of sensors, or, sensors in different areas connected to the
same HA71 Controller. In these cases, it may be undesirable
for a sensor on channel 9 to trip the same relay as a sensor on
channel 2. The Group menus may restrict this. For example,
channels 1-8 might be set to trip common relay 1 while channels
9-16 trip common relay 2. Another possibility is channels 1-8
be set to trip common relay 1 while channels 9-16 trip relays
on an optional discrete relay PCB configured for Alarm 1 (see
Section 3.1.2).
Failsafe• controls relay activation for this common relay. Failsafe
ON causes the relay to de-energize during alarm conditions
and energize when there is no alarm. Therefore a power failure
forces the relay contact to the alarm position. Note the common
Fault relay is always failsafe and may be monitored separately
to indicate loss of power conditions in many applications.
A1 and A2 Votes• allows creation of logical AND function
equations that control common relay 1 & common relay 2.
Default settings for common relay 1 are A1 Votes = 01 and
A2 Votes = 00 which causes relay 1 to trip if any channel has
an A1 level alarm active. Default settings for common relay 2
are A1 Votes = 00 and A2 Votes = 01 which causes relay 2
to trip if any channel has an A2 level alarm active. Example: If
either default setting is modified such that A1 Votes = 02 and
A2 Votes = 01, then any two channels must have an A1 level
alarm active and any one channel must have an A2 level alarm
active to trip that relay.
CAutIoN
One of the A1’s and the A2 could be on the same channel. These level alarms
must come from a channel included in the Group entry described above.
Turning • Acknowledge ON (not available on Alarm 1) allows
the common relay to be deactivated during alarm conditions
by an Alarm Reset. This is useful if an audible device is being
driven by the relay.
CAutIoN
All relays are rated at 5 Amp for 28 VDC and 250 ~VAC RESISTIVE
loads. Appropriate diode (DC loads) or MOV (AC loads) snubber
devices must be installed with inductive loads to prevent RFI noise
spikes. Relay wiring should be kept separate from low level signal
wiring.
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