3 scaling function, 4 measuring steps per revolution, 5 total resolution – ifm electronic RN3001 User Manual
Page 10
Encoder with Profibus interface
10
9.2.3 Scaling function
The scaling function enables parameter setting of the resolution per revolution and
the selected total resolution� It should always be enabled if you want to use the
functions of Class 2 (or the manufacturer-specific classes)�
Octet 9 bit 3
Scaling function
0
Disabled
1
Enabled
9.2.4 Measuring steps per revolution
This parameter is used to assign a requested number of steps referred to one
revolution to the encoder�
If the value of the parameter exceeds the actual physical basic resolution of the
encoder, the output value no longer proceeds by one step�
For encoders as of the B1 generation a parameter fault is displayed in this case;
the device does not change to the cyclic data transfer�
For high-resolution encoders it may be required to split the value into high word
and low word, depending on the projection tool�
Octet
10
11
12
13
Bit
31���24
23���16
15���8
7���0
Data
2
31
to 2
2
4
2
23
to 2
16
2
15
to 2
8
2
7
to 2
0
Requested number of measuring steps per revolution
9.2.5 Total resolution
Octet
14
15
16
17
Bit
31���24
23���16
15���8
7���0
Data
2
31
to 2
2
4
2
23
to 2
16
2
15
to 2
8
2
7
to 2
0
Selected total resolution in measuring steps
This parameter enables the user to adapt the measuring range of the device� The
encoder counts up to the configured total resolution and then it starts again at 0�
Example
Selected: 100 steps per revolution, total resolution 12800, then the encoder starts
again at zero after 128 revolutions and counts again up to 12799�
With many projection tools it may be required to split the value into high word and
low word�