Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 860

Subroutines
820
2. The second MCRO(099) instruction passes the input data in CIO 0200 to
CIO 0203 and executes the subroutine. When the subroutine is complet-
ed, the output data is stored in CIO 0400 to CIO 0403.
1
1
1
Subroutine 1
D: 0300
D+1: 0301
D+2: 0302
D+3: 0303
The second MCRO(099) instruction operates in the same way, but the input
data in CIO 0200 to CIO 0203 is passed to A600 to A603 and the output
data in A604 to A607 is passed to CIO 0400 to CIO 0403.
Input data is passed when
the subroutine is called.
Output data is passed when
returning from the subroutine.
Section 3-19
Macro area input words
Input
Execution of
subroutine 1
Output
Macro area output words
A604
A605
A606
A607
Just the addresses
are different.