Failsafe Circuits - Omron CS1W-MC221 - 02-2008 Operation Manual

Failsafe Circuits

2-4 Failsafe Circuits
Errors during Positioning
made in the machine parameters. For details, refer to SECTION 3 MC Unit
Internal Data Configuration or the CX-Motion Online Help.
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.
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
Error counter
Failed components
Direction
discrimination
circuit
Counter
Failure in command system
Amp
Faulty contact
Encoder
circuits
Failure in feedback system
Section 2-4
Servomotor
Servo
driver
Encoder
Broken lines
133