Sm 335 Parameter For "Comparator" Mode - Siemens SIMATIC SM 335 Manual

3.3.3

SM 335 parameter for "Comparator" mode

In "Comparator" special mode, the SM 335 compares a specified analog value with
the analog value measured on one of the analog inputs. The SM 335 behaves like
a comparator in this operating mode. For detailed information about "Comparator"
mode, see Section 5.2.
Switching
Chapter 5 describes how to switch to the "Comparator" mode.
Restrictions
The parameters for "Comparator" mode can be transferred with system function 55
WR_PARA only.
Data record DR1 must always be transferred completely (bytes 0 to 13).
Data Record 1
The parameters that can be switched dynamically are stored in data record 1 of
the SM 335 (see Table 3-13).
Table 3-13
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
SM 335 data record 1 for "Comparator" special mode
High-order byte of analog output value 1
Low-order byte of analog output value 1
High-order byte of analog output value 2
Low-order byte of analog output value 2
High-order byte of analog output value 3
Low-order byte of analog output value 3
High-order byte of comparison value for "Comparator 1"
Low-order byte of comparison value for "Comparator 1"
High-order byte of comparison value for "Comparator 2"
Low-order byte of comparison value for "Comparator 2"
Comparator time
Dynamic measuring cycle control
Comparator control byte
Reserved
Data Exchange with the SM 335
Content
3-23