Examples of Addressing
17
S7-400 Instruction List
A5E00267845-01
Examples of Addressing, continued
Addressing Examples
Area-Internal Register-Indirect Addressing
A I [AR1,P#12.2]
Area-Crossing Register-Indirect Addressing
For area-crossing register-indirect addressing, the address must also contain an area identifier. The address is in the address register.
The area identifiers are as follows:
Area
Coding
Area
identifier
(binary)
hex.
P
1000 0000
80
I/O area
I
1000 0001
81
Input area
Q
1000 0010
82
Output area
M
1000 0011
83
Bit memory area
DB
1000 0100
84
Data area
DI
1000 0101
85
Instance data area
L
1000 0110
86
Local data area
VL
1000 0111
87
Predecessor local data area (access to local data of invoking block)
L B [AR1,P#8.0]
A [AR1,P#32.3]
Addressing Via Parameters
A Parameter