CANopen Agile
63
06/2010
Objects
9.3.4 Examples of Reading Parameters
Read Parameter
Rated Speed
372 (type uint) in Data Set 2 with the current parameter value 1460.
Index = 372 + 0x2000 = 0x2174, Value = 1460 = 0x05B4
Client
Server
SDO Upload (expedited)
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x601
0x40
0x74
0x21
0x02
--
--
--
--
Server
Client
Upload Response
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x581
0x4B
0x74
0x21
0x02
0xB4
0x05
--
--
Read Parameter
Warning Limit Tk
407 (type int) in Data Set 0 with the current parameter value -5.
Index = 407 + 0x2000 = 0x2197, Value = -5 = 0xFFFB
Client
Server
SDO Upload (expedited)
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x601
0x40
0x97
0x21
0x00
--
--
--
--
Server
Client
Upload Response
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x581
0x4B
0x97
0x21
0x00
0xFB
0xFF
--
--
Read Parameter
Fixed Frequency 1
480 (type long) in Data Set 1 with the current parameter value
75,00 Hz.
Index = 480 + 0x2000 = 0x21E0, Value = 7500 = 0x00001D4C
Client
Server
SDO Upload (expedited)
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x601
0x40
0xE0
0x21
0x01
--
--
--
--
Server
Client
Upload Response
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x581
0x43
0xE0
0x21
0x01
0x4C
0x1D
0x00
0x00
Objects
Reading Parameter
Fixed Frequency 1
480 (Type long) in Data Set 3 with the actual Parameter Value
-10,00 Hz.
Index = 480 + 0x2000 = 0x21E0, Value = -1000 = 0xFFFFFC18
Client
Server
SDO Upload (expedited)
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x601
0x40
0xE0
0x21
0x03
--
--
--
--
Server
Client
Upload Response
0
1
2
3
4
5
6
7
COB ID Control Byte
Index
Sub-Index
Data
0x581
0x43
0xE0
0x21
0x03
0x18
0xFC
0xFF
0xFF
If an error occurs during the reading process, the corresponding error code is indicated in
Bytes 4 … 7. Refer to Chapter 8.3.3 "Error Code Table" for the list of error codes of the SDO Abort.
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