10
DEVICE EXPLANATION
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10.3 Internal System Devices
10.3.1 Function devices (FX, FY, FD)
POINT
Valid devices cannot be used in a subroutine program that contains arguments. If
devices assigned for function registers are used, values of the function registers
will not correctly be returned to a calling program.
Remark
Refer to the following manual for how to use the function devices.
QCPU (Q Mode)/QnACPU Programming Manual (Common Instructions)
Figure 10.46 Ladder example where the devices are unusable in the sub-routine program that contains arguments.
CALLP P0 D0
D R0 R10 FD0
P0
MOV K0 D3
Since the points (D0 to 3) are used
for FD0, D3 can not be used for the
subroutine program.
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