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4. Access methods/SDO access
4−11
Festo P.BE−SEC−AC−CO−E N en 0802a
Following types of PDOs can be differenced:
Type
Data flow
Description
Transmit−PDO
(T−PDO)
Servo
}
Host
Servo controller sends PDO if a certain event occurs
Receive−PDO
(R−PDO)
Host
}
Servo
Servo controller evaluates PDO if a certain event
occurs
The servo controller disposes of two Transmit− and two Re
ceive−PDOs.
Almost all parameters can be embedded (mapped) into a
PDO, i.e. the PDO is for example composed of the velocity
actual value, the position actual value or the like.
Before a PDO can be used the servo controller has to know,
what data shall be transmitted, because a PDO only contains
useful data and no information about the kind of parameter.
In the following example the PDO contains the position actual
value in the data byte D0...D3 and the velocity actual value in
the data bytes D4...D7.
D1
D2
D3
D4
D5
D6
D7
1
2
1
Start of velocity actual value(D4...D7)
2
Start of position actual value (D0...D3)
Fig.4/4:
Almost any desired data frame can be built this way. The fol
lowing chapter shows how to parametrize the servo controller
for that purpose:
Содержание SEC-AC-305-CO
Страница 2: ......
Страница 4: ...Contents and general instructions II Festo P BE SEC AC CO EN en 0802a...
Страница 16: ...Contents and general instructions XIV Festo P BE SEC AC CO EN en 0802a...
Страница 17: ...Introduction 1 1 Festo P BE SEC AC CO EN en 0802a Chapter 1...
Страница 20: ...1 Introduction 1 4 Festo P BE SEC AC CO EN en 0802a...
Страница 21: ...Cabling and pin assignment 2 1 Festo P BE SEC AC CO EN en 0802a Chapter 2...
Страница 31: ...Activation of CANopen 3 1 Festo P BE SEC AC CO EN en 0802a Chapter 3...
Страница 38: ...3 Activation of CANopen 3 8 Festo P BE SEC AC CO EN en 0802a...
Страница 39: ...Access methods SDO access 4 1 Festo P BE SEC AC CO EN en 0802a Chapter 4...
Страница 67: ...Adjustment of parameters Load and save set of parameters 5 1 Festo P BE SEC AC CO EN en 0802a Chapter 5...
Страница 154: ...5 Adjustment of parameters Load and save set of parameters 5 88 Festo P BE SEC AC CO E N en 0802a...
Страница 155: ...Device Control State diagram State machine 6 1 Festo P BE SEC AC CO EN en 0802a Chapter 6...
Страница 179: ...Operating modes Adjustment of the Operating Mode 7 1 Festo P BE SEC AC CO EN en 0802a Chapter 7...
Страница 221: ...7 Operating modes Adjustment of the Operating Mode 7 43 Festo P BE SEC AC CO EN en 0802a...
Страница 247: ...Technical appendix A 1 Festo P BE SEC AC CO EN en 0802a Appendix A...
Страница 248: ...A Technical appendix A 2 Festo P BE SEC AC CO EN en 0802a Contents A 1 Recommended components A 3...
Страница 250: ...A Technical appendix A 4 Festo P BE SEC AC CO EN en 0802a...
Страница 251: ...Index B 1 Festo P BE SEC AC CO EN en 0802a Appendix C...
Страница 252: ...B Index B 2 Festo P BE SEC AC CO EN en 0802a C 1 Index B 3...
Страница 272: ...B Index B 22 Festo P BE SEC AC CO EN en 0802a...