Operation Cycle Assignment; Send/Receive Data Refresh Of Network Connected Devices - Mitsubishi Electric MELSEC iQ-R Series User Manual

Operation cycle assignment

An operation cycle of the axis can be set by AxisName.PrConst.OperationCycle.

Send/Receive data refresh of network connected devices

Network connected devices are distinguished between stations controlled by the motion system and standard stations, and
those data refresh methods are different.
Station
Motion syncronization station
*1
Standard station
*1 Control by the programmable controller
The following shows the relation of data areas and the refresh.
Axis Lib
Motion operation
(Axis data etc.)
processing
Motion ST
Program
Label area
PLC
PLC
Link refresh
program
target area
Motion synchronization station
Select a data refresh method from the following for the station which executes the motion control as a real axis. It can be set
in System.PrConst.Link_MotionStationRefreshType. It is common in all of the operation cycles.
Motion synchronization
station send/receive data
refresh method
Operation cycle precedence
method
Explanation
• The motion system refreshes data by directly synchronizing the network send/receive with the operation cycle.
• The target link device is not refreshed.
• Stations other than motion syncronization stations are standard stations.
• The programmable controller refreshes data.
• The link device is refreshed by synchronizing with the programmable controller.
Motion system
Updating the data
in the motion control station
Motion control station slave
label refresh
Label refresh
Link refresh
Description
• Data receive, motion operation, and data send are executed in different operation cycles. A high-speed operation cycle
can be selected when the motion operation load is high, because these are executed in parallel.
• Since the data refresh timing is slower, the responsiveness to feedback is low.
Network
send/receive
area
Link device
automatic refresh
Link device
area
Updating the data in the
standard station
Dara access
processing
Dara area
Dara access
Dara refresh
3 BASIC FUNCTIONS
91
3.1 Operation Cycle
3