Trigger Conditions - Mitsubishi Electric MELSEC iQ-R Series User Manual

Trigger conditions

Conditions shown in the following table can be selected as the trigger conditions.
Condition Trigger type

Single condition
Compound OR combine
condition
AND combine
Number of times
Order
Single condition
For single condition, triggers occur by satisfying a single condition.
Select one condition from the conditions in the following table.
Condition
Data Comparison
*1
conditions
At value change
Fixed cycle
Time interval specification
Time specification
At module startup
*1 Since the conditions are judged based on the data sampled at the specified sampling interval, a trigger will not be detected if the
condition is not satisfied at the time of data sampling.
■Data conditions (comparison)
Device values or a device value and constant are compared. A trigger occurs when a condition is satisfied.
When the comparison is specified in the condition, the trigger occurrence timing is as follows:
• For bit device (M0 = ON)
A trigger occurs when M0 is turned OFF  ON.
To judge the rise of a bit device, turn OFF the M0 once, then turn it ON again to make a trigger occur.
M0
• When word device (D0>100)
A trigger occurs when D0>100.
A trigger occurs when the value of D0 is less than 100, then it becomes more than 100.
100
D0
0
1 FUNCTION
40
1.1 Data Logging Function
Detailed condition



When a terminal condition holds true
When a specified number of times is exceeded
Abnormal pattern is detected
Normal pattern is detected
Detect timeout
Description
Compares device values or a device value and constant. A trigger occurs when
a condition is satisfied.
(>, , <, , =, )
A trigger occurs when the device value is changed.
A trigger occurs at a fixed cycle (seconds).
A trigger occurs at the specified time interval (hour, minute, or second) from
exactly midnight everyday, exact hour, or exact minute.
A trigger occurs at the specified time.
The condition is satisfied at either of the following timing.
• At the power ON of the CPU module
• After the CPU module is reset
Reference
Page 40 Single condition
Page 43 OR combine
Page 43 AND combine
Page 44 Number of times
Page 45 Order
Reference
Page 157 Trigger (single condition)