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Modbus protocol – KROHNE UFC 400 Modbus EN User Manual

Page 15

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MODBUS PROTOCOL

5

15

UFC 400

www.krohne.com

05/2013 - 4002744801 - AD Modbus UFC 400 R01 en

5.8.3 Measurement values

5.8.4 Measurement Status compliant with NAMUR NE 107

Modbus Function Codes "Read Input Registers" (0x04)

Input
Register

Name

Type

No. of
registers

Units

30000

30000

30000

30000

(0x7530)

Flow Velocity

Float

2

[m/s]

30002

30002

30002

30002

(0x7532)

Volume Flow

Float

2

[m³/s]

30004

30004

30004

30004

(0x7534)

Mass Flow

Float

2

[kg/s]

30006

30006

30006

30006

(0x7536)

Velocity Of Sound

Float

2

[m/s]

30008

30008

30008

30008

(0x7538)

Gain

Float

2

[dB]

30010

30010

30010

30010

(0x753A)

Signal Noise Ratio (SNR)

Float

2

[dB]

30012

30012

30012

30012

(0x753C)

Diagnosis 1

Float

2

[m/s]

30014

30014

30014

30014

(0x753E)

Diagnosis 2

Float

2

[dB]

Modbus Function Codes "Read Input Registers" (0x04)

Input
Register

Name

Type

No. of
registers

Values

30500

30500

30500

30500

(0x7724)

NE 107 Status of Flow Velocity

Byte

1

Bit 7 = Failure (F)

Bit 6 = reserved

Bit 5 = Out of Specification (S)

Bit 4 = Function Check (C)

Bit 3 = Initial Value

Bit 2 = Maintenance required (M)

Bit 1 = Value is too large and limited

Bit 0 = Value is too small and limited

If none of these bits is set, there is no status

message.

30501

30501

30501

30501

(0x7725)

NE 107 Status of Volume Flow

Byte

1

30502

30502

30502

30502

(0x7726)

NE 107 Status of Mass Flow

Byte

1

30503

30503

30503

30503

(0x7727)

NE 107 Status of Velocity Of

Sound

Byte

1

30504

30504

30504

30504

(0x7728)

NE 107 Status of Gain Ratio

Byte

1

30505

30505

30505

30505

(0x7729)

NE 107 Status of Signal Noise

Ratio

Byte

1

30506

30506

30506

30506

(0x772A)

NE 107 Status of Diagnosis 1

Byte

1

30507

30507

30507

30507

(0x772B)

NE 107 Status of Diagnosis 2

Byte

1