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MELSEC-Q
16 COMMUNICATION BETWEEN CPU MODULES IN MULTIPLE PLC
SYSTEM
(2) Automatic refresh settings
Set the points to be transmitted by each CPU and the device in which the data is
to be stored with the PLC parameter multiple PLC settings for when automatic
refresh is to performed.
Range of transmission
setting for each CPU module
Switching between
setting numbers
Sets the header number of
the device for which automatic
refresh is to be performed
(uses consecutive numbers
from the setup device number
to the number of specified points)
(a) Setting switch/range of transmission for each CPU (refresh range)
1): It is possible to set four ranges from Setting 1 to Setting 4 for the
refresh setting with the setting switch. For example, it is possible to set
the refresh function to divide ON/OFF data into bit devices with Setting
1 and other data into word devices with Setting 2.
2): The transmission range for each CPU is set in units of two CPU shared
memory points (two words.) (Becomes 2 points when specifying the
word device with the CPU device, and 32 points when specifying the
bit device.)
PLC data for which the point is set at "0" with the range of transmission
for each CPU will not be refreshed.
As the bit device becomes 16 points at one point of the CPU shared
memory when refreshing is performed with 32 points between B0 and
B1F on the PLC No.1 and with 32 points between B20 and B3F on the
PLC No.2, the number of transmission points is two for the PLC No.1
and two for the PLC No.2.
3): The number of transmission points is a maximum of 2 k points (2 k
words) with a total of four ranges for each CPU module, making a total
of 8 k points (8 k words) for all CPUs.
The CPU shared memory
(PLC share memory)
is set in two points, and the
bit device becomes 32 points
when bit device is specified
on the CPU device.
Not refreshed as the number of points for PLC No.3 and PLC No.4 is 0
• 2 k points (2 k words)
per CPU.
• 8 k points (8 k words)
for all CPUs.
• Setting is in units of
2 points (2 words).
Содержание QCPU (Q Mode)
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