Application Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

Application function

Event detection
When File save setting is set to "Disabled" in the logging setting, only the trigger detection is executed without saving files.
The following can be applied easily by using the trigger detection function of the logging function instead of description of the
satisfied judgement processing of various signal conditions (event detection processing) by a user program.
• Set the complicated error condition or program execution status to the trigger condition and utilize it for preventive
maintenance.
• Monitor whether the monitor value exceeds the threshold value from the upper system and utilize it for debugging of the
program.
Trigger occurrence
Logging setting file set with the detection condition
(Number of saved files = 0)
■Procedures of event detection
1.
Set as follows in the logging setting and start logging.
• File save setting: Disabled
• Logging type: Trigger logging
• Number of trigger logging: 1 time
• Number of trigger records before trigger: 0
• Number of trigger records after trigger: 1
2.
When the set trigger condition is detected, System.LoggingRef[1..10].Md.Trggered and
System.LoggingRef[1..10].Md.TrggerStatus[1..32] turn TRUE. This signal is used to control. (From the upper, used for
monitoring, program execution condition, etc.)
3.
To detect an event continuously, set System.LoggingRef[1..10].Cd.StartLog to FALSE once after a trigger is detected and
set to TRUE again.
Writing
Engineering
tool, Upper
system, etc.
15 LOGGING
468
15.1 Data Logging/Real-Time Monitor
Upper system
Monitoring of
Program and
trigger status
monitor window
Motion system
Logging setting file 1
Target data
Data logging setting
Trigger condition setting
LOGGING_REF structure 1
Control data
Monitor data
(trigger status)
Monitoring,
controlling
Internal buffer
Setting 1
First sampling data
Specified
data
Logging setting file 10
Target data
Data logging setting
Trigger condition setting
LOGGING_REF structure 10
Control data
Monitor data
(trigger status)
Setting 10
First sampling data
File is not saved.