Inhaltsverzeichnis
Werbung
Verfügbare Sprachen
Verfügbare Sprachen
BMD 1E_ _-_ _ _ _/_ _ _-NJ5...
Microwave Position Sensor
3
Measurement data (continued)
3.1.3
Error code
In Byte 6 a detailed error code is output. The meaning of
the individual bits can be found in the following table.
Error code
Bit 8
Reserved
Bit 7
Reserved
Bit 6
Reserved
Bit 5
Reserved
Bit 4
Reserved
Warning:
Bit is set if temperature is outside
Bit 3
the specification (–50...+110 °C)
Byte 6
Bit is cleared in the temperature
range –47...+107 °C
Warning:
Bit is set if temperature is outside
Bit 2
the specification (–40...+95 °C)
Bit is cleared in the temperature
range –37...+92 °C
Warning:
Bit 1
The piston is near the lower
cylinder stop.
Bit 8
Reserved
Error:
Bit 7
Hardware defect 3
Error:
Bit 6
Hardware defect 2
Error:
Bit 5
Hardware defect 1
Error:
Byte 7
Bit 4
Maximum measuring length
exceeded
Error:
Bit 3
Minimum measuring length
exceeded
Error:
Bit 2
Poor signal quality 2
Error:
Bit 1
Poor signal quality 1
3.1.4
Temperature
In Byte 8 the current temperature is output as an 8-bit
unsigned value in °C/bit with an offset of –40 °C
(SLOT SAEtp01 in the SAE J1939 Standard). This results
in a temperature range of –40 to +210 °C.
Resolution, temperature:
Accuracy, temperature:
12
english
1 Kelvin
±5 Kelvin
3.2
Temperature output – PGN 0x00EF00
Output of the temperature is performed by a request
through the PGN 0x00EF00 (61184
current temperature as well as the maximum and minimum
temperature since powering on the BMD SAE J1939.
Specification of the PGN 0x00EF00 (61184
Cycle time
Length of data
Data page
PDU format
PDU Specific
Standard priority
PGN
Source address
Data field
Byte 1
Byte 2
Byte 3
Bytes 4...8
Tab. 3-2:
Structure of the PGN 0x00EF00 – Temperature output
The temperatures are output in a byte as an 8-bit unsigned
value in °C/bit with an offset of –40 °C
(SLOT SAEtp01 in the SAE J1939 Standard). This results
in a temperature range of –40 to +210 °C.
Example:
Requesting the temperature
CAN-ID
RX/TX
0x18EA'BA''MA'
1)
Data
Byte 1
Byte 2
0x00
0xEF
Response
CAN-ID
RX/TX
0x18EF'MA''BA'
1)
Data
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
0x43 0x48 0x42 0xFF
BA = Address of the BMD SAE J1939, MA = Address of the master
1)
Current temperature = 27 °C
Maximum temperature = 32 °C
Minimum temperature = 26 °C
) and contains the
10
)
10
any
8 byte
0x00 (0
)
10
0xEF (239
)
10
BA or 0xFF (255
)
10
0x06 (6
)
10
0x00EF00 (61184
)
10
BA
Current measured
temperature
Maximum temperature
since device startup
Minimum temperature
since device startup
0xFF (255
)
10
DLC
TX
3
Byte 3
0x00
DLC
RX
8
0xFF
0xFF
0xFF
0xFF
Werbung
Inhaltsverzeichnis
