Analog Modules
4-101
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Requirements
• The DP-Master and DP-Slave must support the synchronicity. They require
STEP 7 from Version 5.2.
Module filtering mode: Synchronicity
In synchronous operation the following conditions apply:
Standard Mode
Filter and processing time T
WE
between reading the current value
and loading it into the transfer buffer
(the specified value for T
WE
applies, independent of the activation of
the diagnosis)
max. 625 s
including an input delay time of 10 s
T
DPmin
3.5 ms
Diagnostic interrupt max. 4 x T
DP
Fast Mode (only possible with 6ES7331-7HF01-0AB0)
Filter and processing time T
WE
between reading in the current value
and allocation in the transfer buffer
(diagnosis not selectable)
max. 625 s
including an input delay time of 10 s
T
DPmin
1 ms
Note
By using “Fast Mode” the cycle of the DP system can be accelerated. However,
this is at the expense of the diagnosis: The diagnosis is switched off in this
operating mode.
Together with the calculation and transfer times required on the IM 153, the
specified value for T
WE
results in the minimum settable value of HW Config of
875 s for T
i
.
The specified value for T
DPmin
is dependent on the extent of extension of the DP
slave/IM 153: If there are a number of different plugged in modules, the slowest
module determines the time T
DPmin
.
Note
In “Synchronous” mode, independent of the parameterization made in STEP 7, the
module always sets itself to “Integration time: no /parasitic frequency”. The
“hardware interrupt” functionality is not possible in “Synchronous” mode.
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