WIKA D-10-7 Betriebsanleitung Seite 20

6. Commissioning, operation
Read temperature
The byte "Temperature value" contains the doubled temperature value in the unit °C.
The second most significant bit should be taken as the algebraic sign (0=positive, 1=negative).
GB
Example
Instrument: D-10-7
Measuring range: -1 ... +2.5 bar
Send message
Byte 1 Byte 2
Pressure Pressure
value MSB value LSB
with sign
Measured value
Pressure value MSB/LSB: 0x9158
MSB = 1: Measured value negative
0x1158 = 4,440
dec
Factor/unit: 0x60
Measurement type: relative
Exponent: -4
Unit: bar
Pressure = -4,440 * 10
Pressure = -0.4440 bar
20
Byte 3 Byte 4
Factor, unit Error status
Error detection
Error status: 0x0A
No error,
The pressure transmitter is
working correctly
bar
-4
WIKA operating instructions pressure transmitter model D-1x-7
Byte 5 Byte 6
Error code Service
request
Services
Service request: 0x54
Temperature is transmitted
Service response 1: 0x00
Temperature positive
Service response 2: 0x41
0x0041 = 65
Temperature = 65/2 = +32.5 °C
Byte 7 Byte 8
Service Service
response 1 response 2
dec