Siemens SIMATIC Manual page 328

Analog modules
6.4 Analog input module SM 331; AI 8 x 16 Bit; (6ES7331-7NF10-0AB0)
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 table below shows the contents of the 4 bytes of additional OB40 information during
process or end of cycle interrupts.
Content of the 4 bytes of additional information
Special analog 2 bits per channel to identify the range
flags
High limit exceeded at channel
Low limit exceeded at channel
End of cycle event
Free bit
Operation of the module on the ET 200M Distributed IO devices
Operation of SM 331; AI 8 x 16 Bit 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 Bit 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 these functions are disabled for this reason. This
includes hardware interrupt enable, hardware restrictions and end the enabling of cycle
interrupts. All other parameters are allowed.
328
27 26 25 24 23
7 6 5 4 3
7 6 5 4 3
2 1 0
2 2 2 Byte
2 1 0 0
2 1 0 1
X 2
3
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ