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■Precautions when using Universal model QCPU/LCPU
For the Universal model QCPU and LCPU, an error occurs if any of the following accesses is performed using the following
instructions and data. (Error code: 4101)
Instructions and data
• Instructions for specified each device, including MOV and DMOV
• Instructions for a block of devices, including BMOV and FMOV
• Character string data
Access method
(1) Access crossing the boundary of devices caused by index modification (range of A area)
(2) Access crossing the boundary of file registers caused by index modification
(3) Access to file registers (R, ZR) without setting file register files
(4) Access to file registers (R, ZR) exceeded the range of file register files
*1 The allocation order of individual devices is shown below:
SM
SD
X
Y
M
L
B
F
SB
V
Area A
S
Contact and coil of T
Contact and coil of ST
Contact and coil of C
Present value of T
Present value of ST
Present value of C
D
W
SW
Empty area
File register
(32K points)
Note that the device range check can be disabled using the PLC Parameter so that an error will not be detected even when
the above accesses are performed.
As shown in the following table, the operation of the Universal model QCPU may differ, depending on the serial number.
Setting device range in indexing
Set
Not set
*2 For the method that the device range check is disabled when the index modification is specified, refer to the User's Manual (Function
Explanation, Program Fundamentals) for the CPU module used.
For Universal model QCPU and LCPU, the index modification that crosses internal user devices (SW) and file registers (R)
cannot be applied. (Error code: 4101)
For how to change the internal user device allocation, refer to the User's Manual (Function Explanation,
Program Fundamentals) for the CPU module used.
Boundary B
First five digits of serial No. for Universal model QCPU
Serial No."10021" or lower
Detected errors in accesses 1) to 4)
Detected errors in accesses 2) to 4)
*1
Serial No."10022" or higher
Not detected
3 CONFIGURATION OF INSTRUCTIONS
3.6 Cautions on Programming (Operation Errors)
3
*2
LCPU
115
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