Recording Methods - Mitsubishi Electric MELSEC iQ-R Series User Manual

Recording methods

The following shows the recording methods.
Recording method
File saving trigger only
Recording startup trigger + file saving trigger
File saving trigger only
This is a method of sampling and accumulating data after the operating status of the recording function switches to 'operating.'
(Page 40 Operating status)
When a file saving trigger is satisfied, data accumulated during a period before and after the trigger is satisfied
(Page 21 File saving trigger)
A recording file is saved after a saving period elapses. Data accumulation stops during file saving and restarts after its
completion.
*1 A time before or after a trigger is satisfied (saving period before trigger/saving period after trigger) can be set in the saving period setting
in the recording setting.
When setting the saving period after trigger to '0' seconds, a recording file is saved when a file saving trigger is satisfied.
Page 55 Saving Period Setting
(1)
(2)
(a) (b)
(c)
(1) File saving trigger
(2) Sampling and accumulating data
(3) Sampling data
(4) Time
(a) Saving period before trigger
(b) Saving period after trigger
(c) Saving period
(d) Period during which a recording file is saved
■Considerations
• Set the saving period to a length that can sufficiently sample and accumulate changes in data values.
• When switching a CPU module from RUN to STOP during a saving period after trigger or stopping the operation of the
recording function in the "Recording Monitor" screen, data accumulated before the stop is saved. (Page 65
RECORDING MONITOR)
• Only data after sampling and accumulation started immediately before a file save trigger is satisfied will be saved, and the
data before that will not be saved.
1 FUNCTIONS
16
1.1 Recording Function
Description
Data after the operating status of the recording
function switches to 'operating' is sampled and
accumulated.
Data after the operating status of the recording
function switches to 'operating' and a recording
startup trigger is satisfied is accumulated for a
specified period.
(3) (2)
(d) (a)
Purpose
Select this method to check the status of a device
before and after an error occurs in the device when
the error occurrence timing is clear. (By specifying
an error occurrence as a file saving trigger, the
operating status of a device before and after an error
occurs can be checked.)
Select this method when there is a difference in
timings between when an error occurs and when it is
detected such as when an error occurs while a
device is operating at a regular interval and the
device does not start operating at the next operating
timing.
(By using a recording startup trigger to specify a
timing to start data accumulation and by including a
timing when an error occurs in an accumulation
period, the status of a device when it operated last
can be checked.)
(1)
(3)
(b) (d)
(4)
(c)
*1
is saved.