KEYENCE IV Series - Manual (Page 24)

3-2 - IV Series User’s Manual (Field Network) -
Overview of the cyclic communication
What is cyclic communication?
This function enables cyclic (i.e. in fixed intervals) data communications with the EtherNet/IP devices.
This function provides high-speed control with several to several tens of milliseconds.
The communication can be controlled by referencing and updating the variables in the PLC, making it easy
to control the programs on the PLC side.
Input Area
y Status result
y Control/status/error result
y Statistics information
y Tool information
Output Area
y Trigger control
y External master image
registration control
y Program switching control
y Handshake control
Output data
y Status result
y Control/status/error result
y Statistics information
y Tool information
Input data
y Trigger control
y External master image
registration control
y Program switching control
y Handshake control
RPI
(Communication
cycle)
y Communication settings for the cyclic communication, such as the RPI (communication cycle) and the
data size, will be configured on the PLC side.
y In a network with many connected devices (including the EtherNet/IP devices), a network delay and/
or packet loss may occur when there is a heavy load on the network. Conduct a thorough verification
before the operation.
Overview of the cyclic communication
3
Cyclic communication