6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B–63173EN/03
118
4) Allocation
The start address of the X (DI) of the basic unit containing the analog
input module must always be allocated to an even address.
If the start address is allocated in this way, the digital output addresses
of the analog input module are as shown below, depending on where
the module is mounted.
D If the analog input module is mounted as extended unit 1 (m is the
start address for allocation)
7
UndefinedXm+3 (odd address)
D07
6
D06
5
D05
4
D04
3
D03
2
D02
1
D01
0
D00Xm+4 (even address)
Address within the module
0 0 CHB CHA D11 D10 D09 D08Xm+5 (odd address)
D If the analog input module is mounted as extended unit 2 (m is the
start address for allocation)
7
UndefinedXm+8 (even address)
D07
6
D06
5
D05
4
D04
3
D03
2
D02
1
D01
0
D00Xm+6 (even address)
Address within the module
0 0 CHB CHA D11 D10 D09 D08Xm+7 (odd address)
D If the analog input module is placed as extended unit 3 (m is the
start address for allocation)
7
UndefinedXm+9 (odd address)
D07
6
D06
5
D05
4
D04
3
D03
2
D02
1
D01
0
D00Xm+10 (even address)
Address within the module
0 0 CHB CHA D11 D10 D09 D08Xm+11 (odd address)
NOTE
If 2–byte digital output addresses are to be referenced with
the PMC program, read them in units of words (16 bits).