icoms TMA 3B3, Руководство пользователя

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12 DATA FORMAT
When the message protocol 121 (encoded message, param 50 121) is selected, measurements are sent in encoded format having the
following structure:
Note: This is the format used to communicate with the 3G/4G modems provided as accessories of the TMA-3B3.
12.1 M
EASUREMENT MESSAGE
:
0x02 0x99 MEASUREMENT PAYLOAD 0X03
12.2 M
EASUREMENT PAYLOAD
:
Position Description Range (default) Note
1 Measured speed km/h
2 Supposed length (not measured) decimeters
3 Hundredth of second 0x00 - 0x99 BCD
4 Second 0x00 - 0x59 BCD
5 Minute 0x00 - 0x59 BCD
6 Hour (24h format) 0x00 - 0x24 BCD
7 Day and direction 0x00 - 0x31 (| 0x80) See “Day and direction
byte”
8 Month 0x01 - 0x12 BCD
9 Vehicle counter LSB [0, 16M vehicles]
Counter reset at startup
10 Vehicle counter MSB
11 Vehicle counter MMSB
12 Perpendicular range LSB [0, 4000] centimeters
13 Perpendicular range MSB
14 Detection type 1, 2, 3 or 30 See “detection types”
15 Century 0x20 BCD
16 Year 0x00 - 0x99 BCD
Notes:
•
The given timestamp is the validation time of the laser detection if available (that is, 80 ms after the target has finished crossing
the laser beam, for the default configuration of the device).
•
BCD means “binary coded decimal.” Ex. decimal 42 is encoded as 0x42 (= decimal 66).
•
The vehicle counter is reset at each detector reset and loops over itself in case of overflow.
•
Fields 12, 13 and 14 were previously unused.
12.3 D
AY AND DIRECTION BYTE
:
Position Parameter Signification if 0 Signification if 1
Bit 7 (MSb) Direction Incoming direction Outgoing direction
Bit 6 Day tens 2 (in BCD)
Bit 5 Day tens 1 (in BCD)
Bit 4 Day tens 0 (in BCD)
Bit 3 Day units 3 (in BCD)
Bit 2 Day units 2 (in BCD)
Bit 1 Day units 1 (in BCD)
Bit 0 (LSb) Day units 0 (in BCD)
12.4 ASCII
MESSAGES
(
PARAM
50 100)
When the message protocol 100 is selected, measurements are done according to a semi-colon separated CSV format:
TYP; DATETIME; SPEED; LENGTH
Where:
TYP
is the detection type as a 3 digits number (see “ 12.5 Detection types ” )
DATETIME
is the timestamp of the measurement under the format:
YYYY/mm/dd HH:MM:SS,hhh