Honeywell HA71, Technical Manual

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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
0 PCTLEL
10 PCTLEL
0 PCTLEL
50 PCTLEL
0 PCTLEL
0 PCTLEL
0 PCTLEL
0 PCTLEL
1 2 3 4 5 6 7 8
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 Min 80 Max 30 Avg
0 to 100 PCTLEL SI 125
Ch05 Measurement Name 50 PCTLEL
S y s t e m
C o n t r a s t
A u t h o r i z e C h a n n e l 0
C h a n n e l 0 2
C h a n n e l 0 3
C h a n n e l 0 4
C h a n n e l 0 5
C h a n n e l 0 6
C h a n n e l 0 7
C h a n n e l 0 8 C h a n n e l 0 9
C h a n n e l 1 0
C h a n n e l 1 1
C h a n n e l 1 2
C h a n n e l 1 3
C h a n n e l 1 4
C h a n n e l 1 5
C h a n n e l 1 6
U N L O C K E D
S E T U P M E N U
1
D i a g n o s t i c s
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 key. 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.