Yokogawa Data Logging Software GA10 - Manual (Page 92)

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IM 04L65B01-01EN
What is PC time?
PC time is the time information that the server PC uses. In PC time mode, the server
attaches PC timestamps on the data collected from devices. This data is displayed on the
Monitor Page and saved in recording files.
• Data collected using PC time will not necessarily be synchronized to the data of the
corresponding devices.
Q9
• The timestamps attached to data in PC time mode are determined so that data collection
would always occur at midnight (00:00:00).
• The data collection interval and record interval are specified on GA10.
• The data of all tags is saved to the same file.
What is Device time?
Device time is the time information that the data collection device uses. In Device time
mode, the server collects and records data at the data acquisition intervals of devices. If
there are multiple acquisition intervals in a single device, data is collected and recorded at
each acquisition interval. Device data and collected data are synchronized (the values and
timestamps match).
• Data collection and recording
• Data is collected separately for each device and for each data collection interval.
• Data is collected and recorded at the devices’ data acquisition intervals. You cannot
specify the data collection interval or record interval on GA10.
• Data is saved to separate files for each device and for each data acquisition interval.
Tag for device A,
collection interval A1
Device time
Collection
intervals
A1 and A2
Device A Device B
Collection
interval
B1
Tags for device A and device B PC time
Server
Tag for device A,
collection interval A2
Tag for device B,
collection interval B1
Data
file
Data
file
Data
file
Data
file
The device number, device name, and device acquisition interval are included in the
names of data files. Below is the file name format when date and time are included.
FileName-DeviceNo-DeviceName-Interval-YYYYMMDDhhmmss.ext
FileName: The file name string specified by the user
DeviceNo: Device number on the Device Setting Page
DeviceName: Device name on the Device Setting Page
Interval: The acquisition interval of each device
Chapter 7 Troubleshooting