Analog modules
6.4 Analog input module SM 331; AI 8 x 16 Bit; (6ES7331-7NF10-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6-27
End of cycle interrupt
You can synchronize a process with the conversion cycle of the module by enabling the end
of cycle interrupt. The interrupt is set when enabled channels have been converted.
The following table shows the content of the 4 bytes of additional OB40 information during
hardware or end of cycle interrupts.
Content of the 4 bytes of additional information 27 26 25 24 23 2
2
2
1
2
0
Byte
2 bits per channel to identify the range
High limit exceeded at channel 7 6 5 4 3 2 1 0 0
Low limit exceeded at channel 7 6 5 4 3 2 1 0 1
End of cycle event X 2
Special analog
flags
Free bit 3
Operation of the module on the ET 200M Distributed IO devices
Operation of SM 331; AI 8 x 16 bits on ET 200M requires one of the following IM 153 x:
● IM 153-1; as of 6ES7153-1AA03-0XB0, E 01
● IM 153-2; as of 6ES7153-2AA02-0XB0; E 05
● IM 153-2; as of 6ES7153-2AB01-0XB0; E 04
Programming restrictions when operating SM 331; AI 8 x 16 Bit on PROFIBUS masters which only
support DPV0
Certain parameters are not supported when operating an electrically isolated SM 331; AI 8
16 bits analog input module on an ET200M PROFIBUS slave system in combination with a
PROFIBUS master which is not an S7 master. Non-S7 masters do not support hardware
interrupts. All parameters associated with those functions are thus disabled. This includes
hardware interrupt enable, hardware restrictions and end of cycle interrupt enable. All other
parameters are permitted.
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