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750-671 [Steppercontroller]
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109
Expanded Positioning Functions
WAGO-I/O-SYSTEM 750
I/O Modules
Example: Eight (8) entries are to be loaded to the camshaft table.
Step No.
CAM
Position
Outputs
8 7 6 5 4 3 2 1 Byte
4
MB5
Byte 3
MB4
Byte 2
MB3
Byte 1
MB 3
1
1 0 0 0 0 1 0 0 0x00
0x2e
0xe0
0x84
2
0 1 0 0 0 1 0 0 0x00
0x5d
0xc0
0x44
3
0 0 1 0 0 0 1 0 0x00
0xbb
0x80
0x22
4
0 0 0 1 0 0 1 0 0x01
0x77
0x00
0x12
5
0 0 0 0 1 0 0 0 0x01
0xd4
0xc0
0x08
6
0 1 0 0 0 1 0 0 0x02
0x90
0x40
0x44
7
0 1 0 0 0 0 1 0 0x07
0xb0
0xc0
0x42
8
0 1 0 0 0 0 0 1 0x07
0xdf
0xa0
0x41
The portion of the table highlighted in gray must be downloaded to the
module.
The checksum for the table must also be calculated. To do this, the sum is
taken over all the bytes. Here, the checksum is 0xb0d.
Opcodes given in Chapter 3.1.4.4, „Table Management Commands“ are
required for downloading.
The corresponding opcodes have been adapted in the following table for this
case. For the complete scope and explanations, refer to the sections cited
above.
2.1.2.12.3
Position Table
The position table enables a set Move program sequence containing variable
positions to be run.
Up to 50 positions can be stored in the position table that can be queried by
Move commands. The position table entries can be evaluated on the basis of
absolute or relative Move commands.
The position table can be downloaded. As an alternative to this, individual
entries can be written or "taught" as absolute or relative positions with the
current position.
2.1.2.12.3.1
Teaching of Positions
Teaching of positions using the mailbox command POS_TABLE_TEACH
allows the current actual value to the saved in the position table so that it is
available as a target for a Move task.