UPS Aviation Technologies Apollo SL70R, Installation Manual

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Serial Interface Specification
Apollo SL70R Installation Manual
30
7.3 O
UTPUT
M
ESSAGES
Table 7-1. Output Messages
Msg ID Description Notes
#AL Altitude Message 1 second interval approximate
^SS System Status On power up & continuously upon failure
^MD Operation Mode Message 1 second interval approximate
^AH Alt Hold Message 1 second interval approximate
^RC Replies per second 1 second interval approximate
^C1 Configuration 1 - Software Versions Upon request
7.3.1
A
LTITUDE
The altitude output function is intended to interface with other Apollo products that have
serial altitude input.
7.3.1.1 I
NTERFACE
S
PECIFICATION
Output Rate: Approximately 1 second
Buffer Length: 17 bytes
7.3.1.2 A
LTITUDE
F
ORMAT
S
PECIFICATION
Table 7-2. Altitude Message Format
Byte Contents Description
0 ‘#’ ASCII ‘#’ (0x23)
1 ‘A’ ASCII ‘A’ (0x41)
2 ‘L’ ASCII ‘L’ (0x4C)
3 ‘ ‘ ASCII space (0x20)
4 ‘+’ or ‘-’ Altitude sign; ASCII ‘+’ or ‘-’ (0x2B or 0x2D)
5-9 ddddd Altitude in feet (100 ft resolution)
10-13 ‘T+15’ Temperature (15)
14-15 dd Checksum of bytes 0 through 13. In hex ASCII i.e. “FA”
16 ‘\r’ ASCII carriage return (0x0D)
7.3.1.3 A
LTITUDE
F
ORMAT
S
PECIFICATION
E
XAMPLES
#AL +15D1 100 feet above sea level (@29.92 inches Hg) with temperature
@+15
°
C
#AL -15ED ERROR CODE invalid data @+15
°
C
7.3.1.4 A
LTITUDE
E
RROR
C
ODES
The altitude encoder/converter may place an error code in bytes 4-9. Here is a list of the
possible codes:
•
-09981=Possible Hardware Problem
The converter issues this code if the temperature of the internal heater is greater then
55
°
C, indicating a possible hardware problem or the data received from the encoder is
invalid indicating a possible encoder or wiring problem.
•
-09982=Altitude Out of Range