Profibus PROFIBUS DPV0, User Manual

PROFIBUS USER MANUAL                                                                                                                Leine & Linde AB 

Part Id: 740590-01 

36 

Document Id: 740590 Ver. 01 

Publication date: 2010-06-01 

DDLM_Slave_Diag 

Octet 

28 

29 

30 

31 

Bits 

31 – 24 

23 – 16 

15 – 8 

7 – 0 

Data 

231 – 224 

223 – 216 

215 – 28 

27 – 20 

 Operating 

time 

Table 33 Diagnostics, operating time 

5.6.14 Offset Value 

The offset value is calculated by the preset function and shifts the position value by 

the calculated value. The offset value is stored in the device and can be provided by 

the diagnostic octets 32 to 35. The data type for the offset value is a 32-bit binary 

value with sign, whereby the offset value range is equal to the measuring range of the 

device.  

The preset function is used after the scaling function. This means that the offset 

value is indicated according to the scaled resolution of the device.  

DDLM_Slave_Diag 

Octet 

32 

33 

34 

35 

Bits 

31 – 24 

23 – 16 

15 – 8 

7 – 0 

Data 

231 – 224 

223 – 216 

215– 28 

27 – 20 

 Offset 

Value 

Table 34 Diagnostics, offset value 

5.6.15 Offset Value of the Encoder Manufacturer 

The manufacturer offset value indicates the encoder offset set by the manufacturer. 

This value gives information on the shift of the position zero point in number of 

positions from the physical zero point of the encoder. The data type for the offset 

value is a 32-bit binary value with sign. The value range corresponds to the measuring 

range of the encoder. The offset value of the manufacturer of the encoder is indicated 

in the number of units according to the basic resolution of the encoder. The value is 

stored in write-protected memory, which can be changed only by the encoder 

manufacturer. This value has practically no importance for the user. 

DDLM_Slave_Diag 

Octet 

36 

37 

38 

39 

Bits 

31 – 24 

23 – 16 

15 – 8 

7 – 0 

Data 

231 – 224 

223 – 216 

215 – 28 

27– 20 

Offset Value of the Encoder Manufacturer 

Table 35  Diagnostics, offset value of the encoder manufacturer 

5.6.16 Scaling Parameters Settings 

The scaling parameters are set in the DDLM_Set_Prm function. The parameters are 

stored in the octets 40 to 47 of the diagnostic data. The "Measuring units per 

revolution" and "Total measuring range in measuring units" parameters define the 

selected resolution of the encoders. The status bit of the scaling function in the 

operating status (octet 9 of the diagnostic data) indicates whether the scaling function 

is enabled.