Digital modules
3.10 Digital input module SM 321; DI 16 x 24 VDC; with hardware and diagnostic interrupts
S7-300 Automation System Module data
3-26 Manual, 08/2006, A5E00105505-04
Mode of operation: Isochronous
Conditions of isochronous mode:
Filtering and processing time T
WE
between reading actual values and writing these to the
transfer buffer (the value defined for T
WE
applies, irrespective of the enable status of hardware
interrupts or diagnostics)
255 μs to 345 µs
includes an input delay time of 100 µs
T
DPmin
2.5 ms
Diagnostic interrupt max. 4 x T
DP
Note
In "isochronous" mode, the input delay is automatically set to 100 ms, regardless of the input
delay setting in STEP 7
Further information
For further information on isochronous mode, refer to the STEP 7 Online Help, and to the
Distributed IO System ET 200M
and
"Isochrone mode"
manuals.
(6ES7321-7BH01-0AB0)
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