6 COMMUNICATION FUNCTIONS
6.5 Vision System Connection Function
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Features of vision system connection function
This section explains the features of the Cognex vision system connection function.
■Method of connection with vision system
The Motion CPU and vision system are connected with the Motion CPU's PERIPHERAL IF (Ethernet). A dedicated
communication module, etc., is not needed.
• The Motion CPU and vision system are connected via Ethernet. The response of vision system dedicated
functions may slow down if several devices (MT Developer2, personal computer for In-Sight
Explorer or
GOT, etc.) are connected via an Ethernet HUB.
• When simultaneously controlling two or more vision systems, the execution of commands to other vision
systems may be delayed during the log on process (MVOPEN) with a specific vision system.
• When simultaneously controlling two or more vision systems, if the offline-online state for a specific vision
system is switched from an external source, the execution of commands to other vision systems may be
delayed.
• Execution of the vision system dedicated functions may be delayed if the vision system is in the offline state.
• When the vision system is logged onto, communication is established between the Motion CPU and vision
system to check the connection state even if the vision system dedicated functions are not used.
The following two communication methods can be used simultaneously with Ethernet.
*1
*1 The simultaneous communication cannot be used depending on the vision system's model. Refer to the Cognex vision system manual
or help sections to confirm the specifications of vision system.
•Telnet
The vision system is controlled from the Motion CPU using the native mode. The vision system dedicated functions control
the vision system using Telnet.
• TCP/IP protocol
By using TCP/IP as the vision system communication protocol and setting the output string, the image data are sent in a
batch to the Motion CPU immediately after the job is finished with the vision system. High-speed data transfer is possible
compared to the other communication methods.
■Vision system parameter
Parameters required for Ethernet communication and job execution must be set beforehand with MT Developer2. The vision
system can be controlled just by writing only the vision system dedicated functions in the Motion SFC program.
Ethernet
Telnet
TCP/IP protocol
Cognex make
vision system
Motion controller
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