Siemens SIMATIC SM 335 Manual page 94

Special SM 335 Operating Modes
Comparators 1 and 2
Figure 5-5 shows how the SM 335 works when both comparators are active:
Active
Comparator 2
Not active
Active
Comparator 1
Not active
Fig. 5-5
Operation of Comparator 2
While Comparator 2 is being executed, the analog inputs on the control side are
not updated. The module operates as a stand-alone module.
Message via SM 335 return code, see Table 3-2, Subsec. 3.1.1.
5-8
Comparison value K2
Comparison value K1
Execution time of the
system function
System function
Comparators 1 and 2 in series
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
Time
Time
6ES7 335-7HG00-8BA1