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,
xxx
ASCII representation of the humidity sensor
relative humidity (%)
,
xxxx
ASCII representation of the dew point reading
(°F)
,
xxxx
ASCII representation of the filter time to ser-
vice (hours)
,
xxxx
ASCII representation of the desiccant time to
service (hours)
,
xxxx
ASCII representation of the valve time to
service (hours)
,
x
ASCII representation of programming jump-
ers
,
1 or 0 Is the unit alarmed? 1 = alarm
,
1 or 0 Is service required? 1 = service
,
xx
ASCII representation of the energy savings
(%)
,
x
Reserved for future use, always 1 for now
,
ETX
end of text character OxO3
CR
carriage return
LF
line feed
JUMPERS:
The programming jumpers are as follows (0=off, 1=on):
JP Bit
1
0
off = externally heated on = blower dryer
2
1
on = energy management sensor installed
3
2
on = dew point sensor installed
4
3
on = no cooling (blower purge only)
5
4
on = tower pressure switches installed
6
5
on = not used (fast cycle for development,
V3.5 and prior)
7
6
on = to download language text (factory
use)
8
7
on = to enable factory set-up screens
Determining jumper positions:
Each jumper 8 bits weighted by position
JP
Value
8
128
7
64
6
32
5
16
4
8
3
4
2
2
1
1
Example:
If jumper 8, 5, and 1 are installed, a value of 128+16+1
= 145 is returned
To decode, the algorithm:
· If (number >= 128) è jumper 8 = on
· number = number - 128
· If (number >= 64) è jumper 7 = on
· number = number - 64;
· etc.....
27
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