ifm electronic RM3001 - Handbuch (Seite 58)

58
3.4.5 Singleturn resolution or measuring unit
Depending on the type of measuring instrument the singleturn resolution in the diagnostic function has
different meanings.
Encoder or angle measuring units
For encoders or angle measuring units the diagnostic octets 11 to 14 indicate the physical resolution in
number of measuring units per revolution which is transferred for the absolute singleturn position value.
The max. singleturn resolution is 2
32
.
DDLM_Slave_Diag
Octet 11 12 13 14
Bit 31 - 24 23 - 16 15 - 8 7 - 0
Data 2
31
- 2
24
2
23
- 2
16
2
15
- 2
8
2
7
- 2
0
singleturn resolution
DDLM_Slave_Diag
Octet 11 12 13 14
Bit 31 - 24 23 - 16 15 - 8 7 - 0
Data 2
31
- 2
24
2
23
- 2
16
2
15
- 2
8
2
7
- 2
0
measuring unit
3.4.6 Number of distinguishable revolutions
The number of distinguishable revolutions the encoder can transfer is defined by octets 15 and 16 of the
diagnostic function. In accordance with the formula below the measuring range for a encoder results from
the number of distinguishable revolutions multiplied by the singleturn resolution. The maximum number of
distinguishable revolutions is 65536 (16 bits).
Measuring range = number of distinguishable revolutions x singleturn resolution
DDLM_Slave-Diag
Octet 15 16
Bit 15 - 8 7 - 0
number of distinguishable revolutions
3.4.7 Additional alarms
The diagnostic octet 17 indicates additional alarms for device class 2.
DDLM_Slave_Diag
Octet 17
Bit 7 - 0
additional alarms