133
Failsafe Circuits
Section 2-4
made in the machine parameters. For details, refer to
SECTION 3 MC Unit
Internal Data Configuration
or the
CX-Motion Online Help
.
2-4
Failsafe Circuits
To protect against unforeseen problems that may occur during operation, pro-
vide failsafe circuits, as those shown below, in the positioning system in which
the MC Unit is used.
Errors during Positioning
As illustrated below, motor runaway may occur during operation without a
position loop being formed for these reasons:
• Failure of command system
• Failure of feedback system
Servomotor
Encoder
Servo
driver
Broken lines
Faulty contact
Encoder
circuits
Error counter
Counter
Direction
discrimination
circuit
Failed components
Amp
Failure in feedback system
Failure in command system
Summary of Contents for CS1W-MC221 -
Page 1: ...Motion Control Units Cat No W359 E1 04 CS1W MC221 V1 421 V1 OPERATION MANUAL ...
Page 2: ...CS1W MC221 V1 421 V1 Motion Control Units Operation Manual Revised February 2008 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 11: ...xii ...
Page 15: ...xvi ...
Page 19: ...xx ...
Page 27: ...xxviii Conformance to EC Directives 6 ...
Page 133: ...106 Installation Section 2 2 2 2 4 Dimensions CS1W MC421 CS1W MC221 ...
Page 173: ...146 Connecting Peripheral Devices Section 2 7 ...
Page 227: ...200 Command Area Section 3 6 ...
Page 351: ...324 Interface Specifics Section 5 4 ...
Page 513: ...486 Absolute Encoder Interface Specifications Section 9 7 ...
Page 575: ...548 Error Log Section 12 6 ...
Page 589: ...562 Performance Appendix A ...
Page 655: ...628 Control Bit Flag Timing Charts Appendix E ...
Page 683: ...656 Origin Search Patterns Appendix F ...
Page 685: ...658 Encoder Divider Rate and Rotation Speed for OMRON Servo Drivers Appendix G ...