KEYENCE LJ-V7000 Series - Manual (Page 87)

87 LJ-V7000_COM_RM_E
13 Using the high-speed data communication
command
When the high-speed data communication command is used, data for currently measured profiles can be
output from the controller to a computer at high speed. While performing measurements using the LJ-V
Series, data integrated into the computer can be processed.
13.1 Preparation for high-speed data communication
Make sure of and/or carry out the following before performing high-speed data communication.
[Device]
• Use a network interface card that supports gigabit communication.
• Use a hub that supports gigabit communication.
• Use an ethernet cable that is either category 7 or above, or that supports 10GBASE-T.
[Settings]
• Change the controller operation mode to "high-speed (profile only)".
* To create programs more easily.*
When LJ-H2 (setting/monitoring software for the LJ-V7000 Series) is installed, the DLL sample pro-
gram is stored in the folder that LJ-Navigator2 is installed in. Use this as a reference to make it easier
to create programs.
Example) When LJ-Navigator2 is stored in C:\Program Files, the DLL sample program is stored in the
following folder:
C:\Program Files\KEYENCE\LJ-Navigator 2\lib
• About Req and SendPos parameters which must be specified in request preparation before starting
high-speed data communication
Sendpos: Send start position.
0: From previous send complete position (from oldest data if first time)
1: From oldest data
2: From next data
* Specify 2 to read profiles after high-speed communication starts.
When 0 or 1 is selected, profiles stored in the controller are read before starting high-speed commu-
nication.
* Read profiles are deleted from the controller memory.
* If the sampling period is faster than the reading speed, the memory becomes FULL. If the setting
specified for "Operation when memory full" in Common measurement settings is "Stop", profiles are
not accumulated. If "Overwrite", data is overwritten from the oldest data.
* If there is a long period between the first high-speed data communication and the next, the memory
will be overwritten (when "Operation when memory full" is set to "Overwrite"), and previously sent
position data will be overwritten. In this case specifying 0 will cause an error.
[Performing high-speed data communication]
High-speed data communication uses one of two procedures listed below, according to the format and
measurement contents of the target.
• Without using the batch setting
• Using the batch setting
Batch setting is a function that treats the specified number of profiles as a batch.
It can be set to on or off in LJ-navigator2.