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7.3.5 Transmission Type (Operating mode)
For each PDO a mode of transmission (in index communication parameter)
can be defined. Digital inputs are transmitted by default with ´Change of
Value´(COV).
The kind of transmission dependent on the transmission type for digital inputs.
Transmission
Type
0
1 - 240
241 - 251
252
253
254
255
The data are sended according to the configured Transmission Type of the
modul.
Transmission Types
0
1 - 251
252
253
254 and 255
7.3.6 Inhibit Time
The inhibit time is taken into account only for transmit PDOs. The inhibit time
is the blocking time between two transmit PDOs in periods of 100 µs. The
value is rounded off to the next ms. Values that are <1ms are stored as 0. In
this case the module transfers the PDO as fast as possible.
Attention
In the transmission mode "change of value" (Transmission Types 254 and
255) with frequently changing input signals leads to a high bus load.
PDO transmission
cyclic
acyclic
synchro-
nous
X
X
X
X
- reserved -
X
Meaning
The data is put out with the following Sync object, if they have been
changed.
The data is put out with each n th SYNC object.
The data is put out with the following Sync object, if they have been
requested in advance via a Remote Transmit Request Telegram
(RTR).
The data is put out with each Remote Transmit Request Telegram
(RTR).
The data is put out with each data change.
asynchro-
RTR only
digital inputs
nous
transmission for each SYNC, if
COV
transmission for each x. SYNC
X
request via RTR
X
X
request via RTR
X
COV
X
COV
Fieldbus Dependent I/O Module
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