Wika D-11-7 Uživatelský manuál stáhnout pdf (Strana 20)

20 WIKA operating instructions pressure transmitter model D-1x-7

2478159.05 12/2011 GB/D/F/E

Read temperature

The byte "Temperature value" contains the doubled temperature value in the unit °C.

The second most signicant bit should be taken as the algebraic sign (0=positive, 1=negative).

Example

Instrument: D-10-7

Measuring range: -1 ... +2.5 bar

6. Commissioning, operation

Send message

Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8

Pressure

value MSB

with sign

Pressure

value LSB

Factor, unit Error status Error code Service

request

Service

response 1

Service

response 2

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

-4

bar

Pressure = -0.4440 bar

Error detection

Error status: 0x0A

No error,

The pressure transmitter is

working correctly

Services

Service request: 0x54

Temperature is transmitted

Service response 1: 0x00

Temperature positive

Service response 2: 0x41

0x0041 = 65

dec

Temperature = 65/2 = +32.5 °C

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 111 112

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