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21 DEVICES
21.9 File Register (R/ZR)
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21
21.9
File Register (R/ZR)
This device is a word device for extension. This device is specifically a file register file which exists in the file storage area on
the device/label memory.
Specification method
There are two types of the specification methods for the file register: block switching and serial number methods.
Block switching method
In this method the number of points of file register being used is specified by being divided in increments of 32K point (R0 to
R32767). When using more than one block, specification is conducted by switching to the block number used by the RSET
instruction. "R" is used as the device symbol. The range of "R" is from R0 to R32767. However in the following cases the
upper limit of the device number is "block size (unit: word) -1".
• The file register file size is smaller than 64K bytes.
• The file register file size is not a multiple of 64K bytes and the end block is specified in the RSET instruction.
Serial number method
In this method file registers having more than 32K points are specified using serial device numbers. File registers of the
multiple blocks can be used as consecutive file registers. "ZR" is used as the device symbol. The range of ZR is from ZR0 to
(file register file size (unit: word) -1).
D0
R0
MOV
D0
R0
MOV
R0
R0
RSET
K1
RSET
K2
R32767
R32767
R0
Specify R0 of
the block 1.
Specify R0 of
the block 2.
Block 0
Block 1
Block 2
MOV D0 ZR32768
MOV D0 ZR65536
ZR0
ZR32767
ZR32768
ZR65535
ZR65536
(Block 0)
(Block 1)
(Block 2)
Summary of Contents for MELSEC iQ-R-R00CPU
Page 2: ......
Page 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Page 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Page 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Page 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Page 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
Page 1027: ......