Siemens S5-100U - Analog Modules

S5-100U Addressing
6.3 Analog Modules
You can plug analog modules only into slots 0 through 7. Transfer of 65,536 different items of
information is possible per channel from or to an analog module. The memory requirement is
16 bits=2 bytes=1 word. The modules are addressed byte-by-byte or word-by-word with load or
transfer operations.
The programmable controller takes this increased memory requirement into account when an analog
module is plugged in.
• Eight bytes (=four words) are reserved per slot.
• Two bytes (=1 word) are reserved per channel.
• The slot addressing area is changed.
• The permissible address space extends from byte 64 (slot 0, channel 0) to byte 127 (slot 7,
channel 3).
Figure 6-6. Address Assignment for Analog Modules
Channel number
64+65
66+67
68+69
70+71
76543210Slot number
CPU
0
1
2
3
72...
...79
80...
...87
88...
...95
96...
...103
104...
...111
112...
...119
120...
...127
Examples: 1) Bytes 88+89=analog module in slot 3, channel number 0
2) Channel 1 address of an analog module in slot 5?
Solution: bytes 106+107
Note
Any combination of analog and digital modules is possible in slots 0 through 7.
EWA 4NEB 812 6120-02 6-5