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(b) Serial number access method
In the serial number access method, specify the file registers beyond 32k points with
consecutive device numbers. The file registers of multiple blocks can be used as
consecutive file registers. Use "ZR" as the device name.
(6) Settings and restrictions when refreshing file registers
(a) Settings
The settings of refresh devices are as follows.
• Refresh settings for CC-Link IE controller network
• Refresh settings for MELSECNET/H
• Refresh settings for CC-Link
• Auto refresh settings for the intelligent function module
• Auto refresh settings for the multiple CPU system
(b) Restrictions
The restrictions when specifying file registers to refresh devices are as follows.
1) Refresh cannot be performed correctly if the use of file register which has the
same name as the program is specified by the PLC parameter.
When the file register which has the same name as the program is used,
refresh is performed to the data of the file register having the same name as
the program that is set at the last number in the [Program] tab page of PLC
parameter. To read/write the refresh data, specify the file register to the refresh
device after switching the file register to the corresponding one with the
QDRSET instruction.
2) Refresh cannot be performed correctly if the file name of file register or the
drive number is changed by the QDRSET instruction.
If the file name of file register or the drive number is changed by the QDRSET
instruction, link refresh is performed to the data of the setting file at the time of
the END instruction execution. To read/write the refresh data, specify the file
register of the setting file at the time of the END instruction execution.
If the drive number is changed by the QDRSET instruction when "ZR" is
specified for the device in the CPU modules other than the Universal model
QCPU, an error (LINK PARA ERROR (3101)) occurs. (Note that an error does
not occur when "R" is specified for the device.)
MOV D0 ZR32768
MOV D0 ZR65536
ZR0
ZR32767
ZR32768
ZR65535
ZR65536
Standard RAM/Memory card
(Block 0)
(Block 1)
(Block 2)
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