UPS Aviation Technologies Apollo SL70R, Руководство по установке

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Serial Interface Specification
Apollo SL70R Installation Manual
35
7.4.1.4 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:
•
-09980=Heater Not Ready
The encoder issues this code while the unit is in the warm-up phase.
•
-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
Both the encoder and converter will send this code when the altitude is outside the
specified limits for the device.
7.4.2
M
ODE
The mode message sets the unit’s current operating mode. This includes: 1) selecting
Standby, Mode A or Mode C, 2) enabling Ident 3) adjusting squawk code. This message
is not processed when in setup or test modes. It will also not be process if a system fail-
ure has occurred.
7.4.2.1 I
NTERFACE
S
PECIFICATION
Buffer Length 15 bytes
7.4.2.2 M
ODE
F
ORMAT
S
PECIFICATION
Table 7-12. Mode Message Format
Byte Contents Description
0
‘#’ ASCII ‘#’ (0x23)
1 ‘M’ ASCII ‘M’ (0x4D)
2 ‘D’ ASCII ‘D’ (0x44)
3 ‘ ‘ ASCII space (0x20)
4 m See Mode Table below
5 ‘, ‘ ASCII comma (0x2C)
6 i See Ident Table Below
7 ‘,‘ ASCII comma (0x2C)
8-11 Dddd ASCII Squawk code
12-13 Dd Checksum of bytes 0 through 11. In hex ASCII i.e. “FA”
14 ‘\r’ ASCII carriage return (0x0D)
Table 7-13. Mode Table
m Definition ASCII
O Standby Mode 0x4F
A Mode A 0x41
C Mode C 0x43