25.11.3.3 If data cannot be sampled
If data sampling cannot occur, for example due to a
communication error occurring during sampling, that round of data
will be saved in CSV as follows according to the execution
condition.
When the Execution Condition is [Set Time] or
[Bit ON]
As a read error, [****] is displayed.
(For example, Execution Condition = Time Designation, Start Time
= 17:00, Sampling Cycle = 30 min., Cycles = 5)
When the Execution Condition is [Constant
Cycle], [Constant Cycle when Bit is ON], or [Bit Change]
The read data will appear immediately before a communication
error occurs.
(For example, a communication error occurred right after the
second sampling round, and the error state continued until right
before the third sampling round)
-
The previous sampling cycle data will remain
displayed if the [Sampling Cycle] is shorter than the communication
cycle time, or the communication cycle time becomes longer due to a
screen change/scroll display occurring and exceeds the [Sampling
Cycle], or because sampling is performed before the device/PLC data
is read.
-
When the [Sampling Cycle] is short (1 to 2
seconds, or 100 milliseconds), and a large process occurs such as a
screen change, sampling cannot take place at the defined frequency
(samples will be missed.) As shown above, the previous data will be
used.
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