Yokogawa Data Logging Software GA10 - Manual (Page 91)

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IM 04L65B01-01EN
Q9 The device data and the data collected and recorded by the software
are not synchronized. Why?
A9
Data collected using Device time is recorded as-is by the software. In this situation, the
device data and the collected and recorded data are synchronized.
However, data collected using PC time are timestamped with the PC time and the values are
adjusted accordingly. In this situation, the device data and the collected and recorded data
based on PC time may not be synchronized.
Q10 Can the recorded data be printed?
A10
Data files can be printed using Universal Viewer. Universal Viewer is supplied with this
software and installed along with this software.
Q11 Device settings were changed. At what point are the changes applied
to data collection?
A11
Changes to devices before data collection is started
This software retrieves device information when the device is registered to the Device List. If
this information is different from the actual device information at the start of data collection,
the software will collect data but will handle it as invalid data.
Check the following settings and match them.
Channel data type, unit, span, decimal place, alarm type, and alarm value
You can use Update Setting on the Device List to update the settings.
Changes to devices during data collection and recording
If you change the device settings during data collection and recording, the changes will not
be reflected to the software. Stop the data collection, apply the setting changes using either
of the methods below, and restart the data collection.
• Execute Update Setting of the devices in the devices List.
• Register the device again.
However, if data is being collected using Device time and you change the device’s
acquisition interval, the software will reset the entire monitor data, restart monitoring, and
stop recording.
Do not change the time on the device after starting data collection and recording, because
doing so will cause adverse effects on the monitor screen and recorded data.
Q12 What is the difference between setting the Data time to PC time and
setting the Data time to Device time?
A12
For information on the different data collection conditions, see also “Setting Data
Collection Conditions” on page 3-18 .
The following table summarizes the major differences. For a detailed explanation, see the
following pages.
Differences
Mode Description Backfill
Collection and
Record Interval
Display
Saved Data Files
Trend Monitor Alarm Overview
PC time
Time on the
server PC
No Select from
available
options
No display limitations because all
the data can be displayed on the
same time axis.
Data can be
saved to a single
file.
Device time
Time on the
device
Yes
(fills
dropped
data using
data on the
device)
The interval on
each device is
used, so it is
not possible to
specify a single
interval.
If there are
multiple devices
with different
times or scan
intervals,
Monitor Sets
are subdivided
to display each
combination of
device and scan
interval..
The page is
subdivided and
a list is displayed
for each device.
Files are divided
by a combination
of device and
scan interval.
Chapter 7 Troubleshooting