Omron CS1W-MCH71 -, Руководство по эксплуатации

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Countermeasures
Section 11-2
11-2 Countermeasures
11-2-1 Error Diagnosis Function
• The error diagnosis function stops the system if normal operations
become difficult due to system hardware or software malfunction, or stops
programs and other such operations from operating due to some other
cause.
• If an error occurs, LED output is generated, a four-digit hexadecimal
alarm code is output to the words allocated in the CIO Area and system
variable, and as a general rule, operation is stopped (by System stop,
Execution stop, Deceleration stop, Emergency stop, or servo OFF).
• The error that has occurred is stored in the system variable as the error
log. But it is not backed up. To save the error log even after a restart, use
the IORD instruction to read the error log from the CPU Unit and then it
must be saved in the CPU Unit.
Error Classification MC Unit errors are classified into two types: Alarms, and warnings. Refer to
the following table for explanations of each type.
Alarms • The alarm status is output as LED, Alarm bit, Alarm code, and Error log.
• Alarms are categorized depending on the Alarm type and Alarm rank as
shown below:
66 The speed drops
(comes to a tem-
porary stop) dur-
ing pass
(continuous)
operations. The minimum pass time is
not assured. Calculate the travel time by
dividing the travel distance by
the speed, and check whether
the minimum pass time is being
satisfied. Calculate the minimum pass
time plus the operations in
progress, and adjust the target
distance and speed so that the
travel time will be at least that
much.
67 When the Motion
Program is
paused and then
restarted, it
starts over from
the beginning
instead of con-
tinuing from the
pause. When the bit [Motion Pro-
gram Start] is turned ON at
the restart, the bit [Start
Mode] is ‘0’ or ‘3’. Check the ladder program or
perform a data trace. To resume program execution
from the point where it was
paused, make sure the bit [Start
Mode] is either ‘1’ or ‘2’ before
turning ON the bit [Motion Pro-
gram Start].
No. Problem Probable causes Item to check Remedy
Error type Operation when
error occurs
Servo OFF Notification method Clearing method
Alarm System stop
Servo OFF
Yes LED lit
Sets alarm bit and alarm code in
the allocated area.
• System variable
• Error log
Note But if it occurs when the
power is turned ON, only
method is the LED output.
• Alarm reset.
• Turn the power supply OFF, then
ON again. (Restart)
• Replace the Unit.
Immediate stop
Deceleration stop
Execution stop
No
Warning Continues No Sets warning bit in the allocated
area. • Warning does not have to be
reset.
• Cleared when the cause is
removed.