Baumer GXP8W Manuale - Pagina 9
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8. Encoder Position-Object
The Encoder Position Object is a manufacturer-specific object with class code 2Fh.
Entity attributes
Due to their different functionality, entity attributes are broken down into two groups.
The first group, attribute 1 to 12 comprises the parameters for position calculating.
The second group, attribute 90 to 95 comprises the diagnostic functions.
Altered parameters are not stored in the non-volatile memory until by service "save".
Chart: Parameters for position calculating
Attribute -
Access
ID
1
read
2
read
3
read/
write
4
read
5
read
6
read
7
read/ write
8
read/ write
9
read
10
read/ write
11
read/ write
12
read
Steps per revolution
The parameter „steps per revolution" defines the number of steps per revolution. Upon setting this parameter,
the total resolution will change correspondingly according the following formula:
Total resolution = steps per revolution x revolutions
Sense of rotation
The sense of rotation defines whether the position values are increasing with clockwise rotation (CW) or
counterclockwise rotation (CCW) of the shaft.
Total resolution in steps
The parameter „total resolution in steps" defines the total number of steps covering the complete
measurement range.
Example: steps per revolution = 3600; revolutions = 256;
If the number of revolutions relating to a value is programmed unequal 2
be parameterized anew after crossing the encoder zero point in powerless state.
Manual_GXP8W_EN.doc
04.05.11
Name
Data type
Number of attributes
USINT
Attributes
Array of
USINT
Sense of rotation
BOOL
Internal diagnostic
BOOL
function
Scaling function
BOOL
Position format
USINT
Steps per revolution
UDINT
Total resolution
UDINT
Reserved
UDINT
Preset value
UDINT
COS-Delta
DINT
Position value
DINT
9/13
Significance
Number of attributes supported
List of attributes supported
Setting the sense of rotation
Not used
Scaling function active
Position value format
Number of desired steps per
revolution
Number of desired steps
exceeding the measurement
range
reserved
Position value is set to the preset
value
Minimum divergent value of the
position in COS mode
actual position value
total resolution = 3600 x 256 = 921600
n
(1, 2, 4,...65536), the encoder must
Villingen-Schwenningen, Germany
Values
0 = CW
1 = CCW
0 = OFF
1 = ON
0 = steps
see
operating
parameter
see
operating
parameter
= 0
see
operating
parameter
1 to total
resolution
1 to total
resolution
Baumer IVO GmbH & Co. KG