Trigger Condition - Mitsubishi Electric MELSEC-L Series User Manual

6.3.3

Trigger condition

Specify a trigger condition by selecting appropriate items from the following.
Condition change
specification
Condition
specification
Step No.
specification
When trigger instruction executed
When data logging trigger activated
*1 The following cases are not regarded as trigger conditions.
• When a trigger condition is met again after occurrence of the trigger
• When a trigger condition is met with no data sampling performed
*2 A trigger will also occur in a case other than program execution (link refresh, transient update, a device test conducted
from a peripheral device, etc.)
Setting item
When the bit of the bit device
rises
When the bit of the bit device
falls
When the word device value
meets the specified value
When data are written to a
word device
Always
When execution condition is
ON
When execution condition is
OFF
When execution condition
rises
When execution condition
falls
CHAPTER 6 DATA LOGGING FUNCTION
*1
Description
A trigger occurs when the status of the specified device is changed
from off to on.
A trigger occurs when the status of the specified device is changed
from off to on.
A trigger occurs when the data that match the specified value are
*2
written , regardless of the current value status of the specified
device (match or not match with the specified value).
A trigger occurs when data are written to the specified device.
A trigger occurs any time regardless of the operation status of the
specified step.
A trigger occurs any time but only during operation execution of the
specified step.
A trigger occurs only not during operation execution of the specified
step.
A trigger occurs when the operation nonexecutable status of the
specified step is changed to the executable status.
A trigger occurs when the operation executable status of the
specified step is changed to the nonexecutable status.
A trigger occurs when the trigger logging set instruction (LOGTRG)
is executed.
A trigger occurs when the special relay (Data logging trigger) is
turned on.
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