Mitsubishi Electric MELSEC iQ-R Series Introduction Manual page 50

When using two or more cameras
When using multiple cameras, use the log marker information read function to check the video of each camera at the same
time.
The following describes an example. By reading the log marker added in the video of Camera A to the video of Camera B, a
log marker is added to the position at the same time to check.
Operating procedure
1.
Adding a log marker to the video of Camera A creates a log marker information file (*.vms) in the same folder as the
video recording file.
2.
Open the video of Camera B with the one of Camera A opened.
[File]  [Open]
4 CAMERA RECORDING FUNCTION
49
4.3 GX VideoViewer