Analog modules
6.3 Analog input module SM 331; AI 8 x 16 bit; (6ES7331-7NF00-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
315
The table below shows the relevant configuration of channel groups. The channel group
number is required to program SFC parameters in the user program.
Table 6- 7 Assignment of SM 331; AI 8 x 16 Bit channels to channel groups
... form one channel group each
Channel group 0
Channel 1
Channel group 1
Channel group 2
Channel group 3
See also
Diagnostics messages of analog input modules (Page 296)
6.3.3 Additional information on SM 331; AI 8 x 16 Bit
Unused channels
Set the "disabled" value at the "measuring type" parameter for unused channels. This setting
reduces module cycle times.
As certain programmed inputs may remain unused due to the channel group configuration,
make allowances for the special features of those inputs outlined below in order to be able to
use the diagnostic functions at these used channels:
●
Measuring range 1 V to 5 V: wire the used input and unused input of the same channel
group in parallel.
● Current measurement, 4 mA to 20 mA: wire the used input and unused input of the same
channel group in series. Connect a shunt resistor to each programmed and unused
channel.
●
Other measuring ranges:Short-circuit the plus and minus inputs of the channel.
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