Special SM 335 Operating Modes
5-10
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
5.2.2 SM 335 parameters for Comparator mode
Restrictions
The parameters for “Comparator” mode can be passed with system function 55
WR_PARA.
Data Record 1
The dynamic parameters are entered in data record 1 on the SM 335 (see
Table 5-2).
Table 5-2 Data record 1 on the SM 335 for “Comparator” mode
Byte
Content
0 Analog output value 1, high-order byte
1 Analog output value 1, low-order byte
2 Analog output value 2, high-order byte
3 Analog output value 2, low-order byte
4 Analog output value 3, high-order byte
5 Analog output value 3, low-order byte
6 Comparison value for “Comparator 1”, high-order byte
7 Comparison value for “Comparator 1”, low-order byte
8 Comparison value for “Comparator 2”, high-order byte
9 Comparison value for “Comparator 2”, low-order byte
10 Comparator time
11 Dynamic measuring cycle control
12 Comparator control byte
13 Reserved