Mitsubishi MELSEC Q Series Programming Manual page 501

(4) Only the file name of a program file stored in the drive 0 (program memory/internal RAM)
can be designated for a file name.
(5) It is not necessary to designate the extension (.QPG) with the file name.
(Only .QPG files will be acted on.)
(6) When function devices (FX, FY, FD) are used by a subroutine program, specify a device
corresponding to the function device with
[MAIN]
[ABC]
(a) Prior to execution of the subroutine program, bit data is transmitted to FX, and word
data is transmitted to FD.
(b) After the execution of the subroutine program, the contents of FY and FD are
transmitted to the corresponding devices.
(c) The processing units for the function devices are as follows:
• FX, FY: Bits
• FD : 4-word units
The size of the data to be dealt with will differ depending on the device specified in the
argument. The device specified as a function device should be secured for the data
size. An error will occur if it cannot be secured for the data size.
Function devices
Bit device
• FX
When Bit Designation has been Made for Word
• FY
Device
When digit designation of a bit device is used*1
• FD
Word device
*1: An error will not occur even when the device number specified by
designation of the bit device.
[Main routine program]
X0
EFCALL
to .
S1 S5
Device
"ABC" P0 M0 D0 D30
Data Size Remark
1 point
1 bit
The upper 2 words of
4 words
FD become 0
4 words
to is not a multiple of 16 at the digit
S1 S5
Occupies from D30 to D33 (Transfer to FD2).
Occupies from D0 to D3 (Transfer to FD1).
Occupies M0 (Transfer to FX0).
EFCALL(P)
1
2
3
4
6
6
7
8
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