SYSTEM INSTALLATION MANUAL
89000016
SERIAL INTERFACE SPECIFICATIONS
1.
General
A.
Overview
(1)
Two data formats can be selected to accept input from external altitude sensors:
• Encoder altitude - Gray-code to serial altitude converters, etc.
• Air data computer - To select a data format, refer to Paragraph 3.
2.
Altitude Encoder Format
A.
General
(1)
The altitude encoder data format accepts messages with the following parameters:
• Baud: 9600
• Parity: None
• Start bit: 1
• Data bits: 8
• Stop bit: 1
• Update rate: 1 message for each second.
(2)
Compatible devices include Rosetta encoders and serializers (ARS 50 and ARS 100). The
compatible format for altitude information is the 10-byte ASCII message shown in Table 6001.
Table 6001. ASCII Message
Byte
0
1
2
3
4
5
6
7
8
9
Contents
A
L
T
1
2
3
4
5
c/r
(3)
Some examples include:
• ALT 00000: 0 feet
• ALT
1200:
1200 feet
• ALT 62505: 62,505 feet
• ALT 05604: 5,604 feet.
3.
Air Data Computer/Sensor Format
A.
General
(1)
The ADC format accepts messages with the following parameters:
• Baud: 9600 (default minimum)
• Parity: None
• Start bit: 1
• Data bits: 8
• Stop bit: 1
• Update rate: 1 message for each second.
EFFECTIVITY
ALL
Page 6001
22 Dec 2016
© Honeywell International Inc. Do not copy without express permission of Honeywell.