Data Exchange with the SM 335
3-27
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
3.3.4
SM 335 parameters for “Measuring Only” special mode
In “Measuring Only” special mode, the SM 335 only measures the analog inputs in
Free Cycle and does not update the analog outputs. For detailed information about
“Measuring Only” mode, see Section 5.3.
Switching
Chapter 5 describes how to switch to “Measuring Only” mode.
Data Record 1
You can transfer the dynamic parameters (data record 1) for “Measuring Only”
mode with system function 55 WR_PARA. The data record must always be trans-
ferred completely.
Note
The parameters in data record 1 that you transfer to switch to “Measuring Only”
mode must be identical with the parameters that you transferred for Free Cycle or
Conditional Cycle modes, with the exception of byte 11.
Table 3-15
SM 335 Data record 1 for “Measuring Only” special mode
Byte
Content
0
1
2
3
4
A
i
d
i F
C
l
d C
diti
l C
l
d
5
Assigned as in Free Cycle and Conditional Cycle modes
(see Table 3-11)
6
(see Table 3-11)
7
8
9
10
11
Dynamic measuring cycle control
12
Assigned as in Free Cycle and Conditional Cycle modes
13
Assigned as in Free Cycle and Conditional Cycle modes
(see Table 3-11)
