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S5-95F
6.4
Analog Modules
You can plug analog modules only into slots 0 through 7. Whereas only the information "0" or "1"
("ON" or "OFF") per channel can be transferred from or to a digital module (memory requirement 1
bit), it is possible to transfer 65,536 different items of information 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.
•
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).
Address assignments for analog modules in subunit A
Slot number
S5-95F
basic unit
Address assignments for analog modules in subunit B
Slot number
S5-95F
basic unit
Figure 6-5. Address Assignment for Analog Modules
Examples:
1)
2)
EWA 4NEB 812 6210-02
0
2
64+65
80+81
66+67
82+83
68+69
84+85
70+71
86+87
1
3
72+73
88+89
74+75
90+91
76+77
92+93
78+79
94+95
Analog module in slot 2, channel number 0 bytes 80 and 81
Channel 1 address of an analog module in slot 5?
Solution:
bytes 106+107
Bytes 92 and 93 Analog modules in slot 3, channel number 2
4
6
96+97
112+113
98+99
114+115
100+101
116+117
102+103
118+119
5
7
104+105
120+121
106+107
122+123
108+109
124+125
110+111
126+127
Addressing
Channel
number
0
1
2
3
Channel
number
0
1
2
3
6-5
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