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2 MULTIPLE CPU SYSTEM
(3) Automatic refresh settings 2 (Manual setting)
(a) When the automatic refresh setting (Manual setting) of Motion CPU is used,
there are the following advantages.
1) A device setting which executes the automatic refresh setting between
the PLC CPU and Motion CPU can be performed flexibly.
2) Because it is made not to execute the automatic refresh setting between
the Motion CPU using a dummy setting, it is not necessary to use the
user device for the automatic refresh vainly, and a main cycle can also
be shortened.
3) It is possible to execute the automatic refresh of Motion device (#) to the
PLC CPU directly. Similarly, it is possible to execute the automatic
refresh for data of the PLC CPU to the Motion device (#) directly.
Refer to the "QCPU User's Manual (Functions Explanation/Program
Fundamentals)" about the setting for the PLC CPU.
• The first device can be arbitrarily set up for
every CPU. "DUMMY(*)" can be set to the
first device except the self CPU.
• The motion device (#) can be set as a first
device.
(b) Setting selection/send range (refresh range) for each CPU
1) The refresh setting of four ranges can be set by setting selection.
For example, ON/OFF data may be refreshed using bit-device setting,
while other data may be refreshed word device setting.
2) The number of points in the shared CPU memory is set in units of 2
points (2 words) is set in the send range for each CPU. (2 points if word
device is specified for the CPU-side device, or 32 points if bit device is
specified.)
Data of the CPU for which "0" is set as the number of points
representing the transmitting range of the CPU may not be refreshed.
3) The maximum number of transmitting points combining all four ranges is
2k words per CPU (PLC CPU or Motion CPU) or 8k points (8k words) for
all CPUs.
4) If "*" is set as the first device setting column A of each automatic refresh
setting, the first device for every CPU can be arbitrarily set up by the
user in the column of B.