Measuring Cycle Time (Ds1, Byte 10); Dynamic Measuring Cycle Control (Ds1, Byte 11); Meaning Of The Bits In The " Dynamic Measuring Cycle Control" Byte - Siemens SIMATIC S7-300 Manual

Data exchange with SM 335
3.3 Modifying SM 335 parameters in RUN

Measuring cycle time (DS1, byte 10)

Set up the duration of a measuring cycle at the measuring cycle time parameter. Default
value is 01
If you enter the value:
● 01
● 02
● 03
● 00
Note
Measuring cycle time of 1 ms: The modified values are output before the start of the first
measurement (channel CH3). The measurements follow in the next step. The diagnostics
functions for detection of short-circuits and overflow/underflow are not executed order to
enable the processing of all I/O channels within 1 ms. The comparator function is not
executed within the 1 ms cycle. The comparator 1 function cannot be executed due to the
lack of sufficient time!

Dynamic measuring cycle control (DS1, byte 11)

The parameter for dynamic measuring cycle control cannot be set up in HW Config. It is
used to toggle the module to the special operating modes. In the free and conditional cycle
modes, this byte always has the value 00
Figure 3-4
52
.
H
, the measuring cycle runs freely, i.e., one measuring cycle has a duration of approx.
H
0.9 ms (1 to 1.2 ms if the update of analog outputs is included, depending on the number
of analog outputs).
is equivalent to a measuring cycle of 1 ms
H
is equivalent to a measuring cycle of 1.5 ms, etc.
H
is equivalent to a measuring cycle of 16 ms
H

Meaning of the bits in the " dynamic measuring cycle control" byte

.
H
SM 335 - High-speed analog mixed module for SIMATIC S7-300
Manual, 02/2009, A5E02409063-01