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Modbus RTU Function Codes

22 Modbus® RTU Serial Communications User Manual 02/13

3.8 Function Code 17 (11h) – Report Device ID

Description

Function code 17 (11h) is used to report the Device Information that includes information like: Slave ID,

device description, and firmware version.

Query

The query message specifies the function code only.

Query message format for function code 17 (11h)

Slave

Address

Function

Code

CRC CRC

Example:

Read Device ID from a slave at address 02.

02 11 CRC CRC

Response

The response is a record format describing the instrument.

Response message format for function code 17 (11h)

Slave

Address

Function

Code

Byte

Count

Slave

Run

Indicator

Status

Device

Specific

Data

CRC CRC

Slave ID – The number associated with the device.

(one byte) (byte 3)

Slave ID

(hex)

Device Type Slave ID

(hex)

Device Type

N/A DPR100 (Does not support

11h)

33 UDC3300

18 DPR180 35 UDC3500

25 DPR250 53 UDC5300, RSX, VPR, VRX

43 DR4300 02 UDC6000

45 DR4500 63 UDC6300

23 UDC2300 10 10260S

26 UDC2500 11 11280S

32 UDC3200 20 SA2001, SA2002

05 Minitrend V5, Multitrend

Plus V5

QX and SX Recorders

Run Indicator Status:

(one byte) (byte 4)

00=OFF; FF=ON

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 75 76

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Siemens NAN 67 Series Manual de usuario Pagina 28

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