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CHAPTER8 PARAMETERS
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8.1  PLC Parameters
 
*1ÅF When changing the device points, new setting must not exceed the refresh ranges of network modules or the auto refresh ranges of 
intelligent function modules.
If a new device point setting exceeds the corresponding device range, the data may be written to another device or an error may occur.
*2: When a device latch range is set, the scan time increases.
When latching a device, consider the increase in the scan time. (  Section 10.1.2)
*3: The points for the step relay (S) can be changed to 0 if the serial number (first five digits) of the Universal model QCPU is "10042" or later.
*4: Available only when the serial number (first five digits) of the Universal model QCPU is "10042" or later.
*5: For the Q03UDCPU, Q04UDHCPU, Q06UDHCPU, Q13UDHCPU, Q26UDHCPU, Q03UDECPU, Q04UDEHCPU, Q06UDEHCPU, 
Q13UDEHCPU, or Q26UDEHCPU, if the serial number (first five digits) is "10101" or earlier, the index register cannot be used as a 
local device. (  Section 9.14.2)
*6: Not available for the Q00UJCPU.
Table8.5 Device setting list (continued)
Item
Parameter 
No.
Description Setting range Default Reference
File register 
extended 
setting
*6
Device points 2000H
Set points for the file register 
(ZR), extended data register 
(D), and extended link register 
(W).
Point assignment to the file 
register (ZR), extended data 
register (D), or extended link 
register (W). Assign part of the 
points of the file register to the 
extended data register and 
extended link register.
Blank
Section 9.1, 
9.8
Latch (1) start/end 
(Latch clear valid)
2004
H
Set a latch range (start and 
end device numbers), which 
can be cleared by remote latch 
clear operation.
Each latch range for the file 
register (ZR), extended data 
register (D), or extended link 
register (W).
Blank
Section 3.4, 
6.3
Latch (2) start/end 
(Latch clear invalid)
2005
H
Set a latch range (start and 
end device numbers), which 
cannot be cleared by remote 
latch clear operation.
Each latch range for the file 
register (ZR), extended data 
register (D), or extended link 
register (W).
Blank
Section 3.4, 
6.3
32 bit Indexing
*4
2000H
Select Z or ZZ device for 32-bit 
indexing.
Z0 to Z18 (when using Z device) Use Z
QCPU 
Programmin
g Manual 
(Common 
Instructions)