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Appendix 6 Data Collection Method for CPUs that cannot be Accessed Directly
APPENDICES
Appendix 6 Data Collection Method for CPUs that cannot be
Accessed Directly
This section explains the method for collecting data from CPUs that cannot be accessed
directly (hereafter, explained with the Motion CPU).
(1) Auto refresh using CPU shared memory in a multiple CPU system
By performing auto refresh between the QCPU and Motion CPU in the multiple CPU
system, device data in the Motion CPU can be read to the QCPU.
Registering device data read to the QCPU with tags enables to handle the device data
in the Motion CPU.
(2) Settings required for auto refresh
Set the devices to which data are stored and the number of points sent by each CPU
with [PLC parameter] - [Multiple CPU settings] - [Refresh settings] of GX Developer.
For auto refresh settings, refer to the following manual.
QCPU User's Manual (Multiple CPU System)
(3) Acquisition example of the Motion CPU device data
(a) System configuration
Figure App.6 System configuration
Motion CPU (CPU No.2
)
CPU (No.1)
MES interface
module