136
Failsafe Circuits
Section 2-4
Stopping the Motor with an Error Counter Overflow
Error Counter Overflows
When the error counter overflows, a speed reference voltage of 0 V will be
output to the Servo Driver for 0.5 s and then the operation command output to
the Servo Driver will be turned OFF.
The value of the error counter at which an overflow occurs can be controlled
using the Error Counter Function Selection Bit. The following settings are pos-
sible.
ON:
An overflow will occur at 65,535.
When the Selection Bit is ON, the Error Counter Warning Flag can
also be used.
OFF:
An overflow will occur at the value set for the error counter warning.
When the Selection Bit is ON, the Error Counter Warning Flag thus
cannot be used.
Refer to
Error Counter Function Selection Bit
in
5-4-1 System Controls
for
more information.
Failsafe Circuits
The example shown below shows handling an error occurring during position-
ing. The MC Unit checks the error counter, and the Error Counter Warning
Flag in the PLC Interface Area is turned ON whenever the Error Counter
Warning Value is exceeded.
0.5 s
Error Counter Function
Selection Bit set to OFF.
Operation
command output
Error
counter
Ladder
program
execution
MC Unit
Servo
driver
Voltage output
CPU Unit
Servomotor
Operation command output
Speed reference voltage
0 V
OFF
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 ...