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When performing the following access in Universal model QCPU, an error (error code:
4101) occurs.
1) Access crossing the boundary of devices caused by indexing
(range of A area)
The allocation order of individual devices is shown below:
2) Access crossing the boundary of file registers caused by indexing
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
Presetting PC parameter not to check indexing device range enables the Universal
model QCPU not to detect an error in the above accesses from 1) to 4).
Detecting an error in the above accesses from 1) to 4) , however, depends on the serial
No. of Universal model QCPU.
*2
*2: For changing the settings of the PLC parameter on GX Developer, refer to the QnUCPU User's Manual
(Function Explanation, Program Fundamentals) or Qn(H)/QnPH/QnPRHCPU User's Manual (Function
Explanation, Program Fundamentals).
When indexing is executed only with Universal model QCPU, devices between
internal user devices (SW) and file registers (R) cannot be skipped. (Error code:
4101).
Setting device range in indexing
First 5 digits of serial No. for Universal model QCPU
Serial No.”10021” or lower Serial No.”10022” or higer
Set Detected errors in accesses 1) to 4)
Not set Detected errors in accesses 2) to 4) Not detected
SM
SD
X
Y
M
L
B
F
SB
V
S
D
W
SW
Empty area
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
File register
(32K points)
Boundary B
Area A