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Fundamentals of Positioning IP 266
A setpoint generator is required for programmable positioning operations,
regardless of whether positioning is in an open or closed loop.
The setpoint generator's output variable depends on a number of parameters:
• the difference between the current position of the axis and the target
position
• speed
• acceleration/deceleration
Open-loop positioning
When positioning under open-loop control, the setpoint generator provides a
time-dependent speed
or speed setpoint V
setp
(t). This is the voltage used to drive the
power section. Drive movement is governed by this voltage. The setpoint
generator outputs the setpoint voltage until the drive has reached the target
position.
During positioning, the setpoint generator is not informed of the current
position. There is thus no guarantee that the drive's final position is identical to
the required target position.
Figure 4-2. Open-Loop Positioning
Target position
Speed
Acceleration
V
T
V
setp
(t)
V
act
(t)
M
Speed
controller
Actuator
Power section
T
Setpoint
generator
M: Motor
T: Tachogenerator
V
T
: Tacho voltage
Measuring
transducer
4-2
EWA 4NEB 812 6057-02
- SIMATIC S5 1
- Positioning Module 1
- Copyright© Siemens AG 1991 2
- IP 266 Preface 4
- Introduction 5
- Introduction IP 266 6
- Training courses 7
- Reference literature 7
- IP 266 Introduction 9
- Conventions 10
- 1 System Overview 13
- 1.1 Application 14
- 1.2 Axis Types 15
- System Overview IP 266 16
- IP 266 System Overview 17
- - External ground 32
- 2.5.3 External Stop (Pin 6) 34
- 2.5.8 Examples 40
- Job is executed 41
- End of program 41
- Example 2 42
- 2.6 Fault LED 44
- 2.7 IP 266 Monitors 45
- 2.7.1 Encoder Monitor 45
- 2.8 Technical Specifications 48
- 3 Installation Guidelines 52
- C A U T I O N : 53
- 4 Fundamentals of Positioning 60
- 4.3 Terms 64
- 4.3.1 Positioning 64
- 4.3.3 Relationships Between a 66
- 4.4 IP 266 Modes 67
- 5.1 Machine Data 73
- 5.1.1 Hardware Description 75
- 5.1.3 Traversing Range 79
- 5.1.4 Speeds 81
- 5.1.5 Acceleration Rates 83
- 5.1.6 Controller Parameters 84
- 5.1.7 Correction Parameters 87
- 5.3 IP 266 Modes 95
- 5.3.1 Jog 1 (Mode 1) 95
- 5.3.2 Jog 2 (Mode 2) 98
- 5.3.4 Follow-Up Mode (Mode 4) 99
- EWA 4NEB 812 6057-02 100
- 2000 mm/min 102
- 200 mm/min 102
- 0.000 mm 102
- -1-2-5 1 2 108
- Reference Point Coordinate 0 108
- 0 1 2 5 9-1-2 108
- 112
- 5.3.8 Automatic Mode (Mode 8) 115
- Store as block 121
- Store as block 2 121
- negative 126
- positive 126
- Example: Tool change and TO 131
- 5.3.20 EEPROM (Mode 26) 137
- 5.4.1 Program Header 141
- 5.4.2 Traversing Blocks 142
- 5.4.3 Last Block 163
- 6 Fundamentals of COM 266 168
- 6.1.2 System Configuration 169
- 6.1.3 Starting COM 266 170
- Data area: 176
- 6.4.1 Entering Machine Data 186
- Data area for a linear axis: 195
- F1 F7 F1 F3 210
- F1 F7 F3 F2 212
- 6.6 COM 266 Test Mode 222
- Function key menu: 232
- 6.7 Output 235
- 6.8 Delete 237
- 6.9 Information 240
- 6.10 COM 266 Error Messages 243
- 7.1.1 Byte 0: Mode 249
- 7.1.2 Byte 1: Commands 250
- RAM Parameters 252
- 7.1.4 Byte 3: Override Factor 252
- 7.2.1 Byte 0: Mode 259
- 7.2.2 Byte 1: M Function 259
- 7.2.3 Byte 2: Status Bits 260
- Example 1: 262
- The reference point is set: 262
- 7.2.4 Byte 3: Error Flags 263
- 8 Start-Up 267
- Start-Up IP 266 268
- 8.1.3 Drive System Mechanics 269
- 8.1.5 Programmer 271
- IP 266 Start-Up 273
- 8.3 Initializing the IP 266 277
- 9 STEP 5 Programming 289
- STEP 5 Programming IP 266 290
- 9.1.4 Error Analysis 291
- IP 266 STEP 5 Programming 293
- 9.4.1 Cold S5-100U Restart 299
- IP synchron 301
- Invoke mode 4 303
- Job ter 304
- Reference 304
- Positions 321
- Was the last 324
- 10 Troubleshooting 327
- Troubleshooting IP 266 328
- IP 266 Troubleshooting 329
- Basic unit/1000 330
- Pulses 330
- A [µm/pulse] · 60 331
- IP 266 Index 345
- Index IP 266 346
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