Omron CS1W-MC221 - 02-2008 Operation Manual page 164

Failsafe Circuits
Stopping the Motor with Zones
Zones
Failsafe Circuits
CPU Unit
X-axis Zone Flag
Ladder
Y-axis Zone Flag
program
execution
External
output
Y axis
Zones can be set in the Zone Parameters in the System Parameters so that a
Zone Flag will be turned ON in the CPU Unit when the motor is within a zone.
Refer to Zone Parameters on page 167 for details.
First, the zones are set in the System Parameters and then the ladder pro-
gram is written to stop the motor when a Zone Flag turns ON. In the following
example, the X-axis and Y-axis Zone Flags are monitored in the ladder dia-
gram. If both flags are ON at the same time, the CPU Unit uses an external
output to activate a dynamic brake and stop motion.
MC Unit
X axis
Voltage
Servo
output
driver
Voltage
output
Y axis
Servo
driver
Zone
X axis
Section 2-4
Servomotor
Servomotor
137