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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
8-6 A5E00105492-03
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The example in the figure below shows you which default channel addresses are
obtained if an analog module is inserted in slot 4. As you can see, the input and
output channels of an analog I/O module are addressed starting at the same
address, namely the module start address.
Slot number 3 has not been assigned since there is no interface module in the
example.
Slot
number
2
4
Inputs
:
:
Outputs
1
:
:
SF
BUSF
DC5V
FRCE
RUN
STOP
SIEMENS
CPU
PS
SM
SM (analog module)
Channel 0: address 256
Channel 1: address 258
Channel 0: address 256
Channel 1: address 258
Figure 8-4 I/O addresses of an analog module in Slot 4
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The integrated inputs and outputs of this CPU have the following addresses:
Table 8-1 Integrated inputs and outputs on the CPU 312C
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10 digital inputs 124.0 to 125.1
of those are 8 Inputs for
technological functions:
124.0 to 124.7
6 digital outputs 124.0 to 124.5
of those are 2 Inputs for
technological functions:
124.0 to 124.1
All digital inputs can be programmed
as interrupt input.
Optional technological functions:
• Counting
• Frequency measurement
• Pulse width modulation
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