Mitsubishi Electric MELSEC iQ-R Series User Manual page 48

Sampling timing when selecting "Trigger Instruction"
The sampling timing is as follows:
Ex.
When executing the DATATRG instruction in an interrupt program
(a)
(1)
(b)
(1) I/O refresh
(2) Program operation
(3) END processing
(4) DATATRG instruction execution sampling processing
(5) Scan time
(6) Time
(a) Scan execution program
(b) Interrupt program
*1 The time required for sampling processing for the number of times the DATATRG instruction is executed is added to the scan time. For
details on the sampling time, refer to the following:
Page 296 Sampling time
When specifying "Trigger Instruction" for the sampling method and executing the DATATRG instruction in a
fixed cycle execution program and an interrupt program, a device and label can be sampled when executing
these programs.
The DATATRG instruction cannot be executed in a safety program. To sample a device and label when
executing a safety program, specify "Safety Cycle Time" for the sampling method.
Precautions
If an interval for trigger instruction execution is longer than a saving period, sampled data may not be included in the saving
period. In this case, saving a file fails when a file saving trigger is satisfied and an error occurs in a recorder module/camera
recorder module.
A saving period differs depending on the recording method. For details, refer to the following: (Page 18 Recording
methods)
1 FUNCTIONS
46
1.1 Recording Function
(2) (2)
(2)
(4)
(5)
*1
(2) (3) (3)
(2)
(2)
(4) (4)
(1) (2) (2)
(2)
(4)
(2)
(2)
(4)
(6)