Conel CDA 70, Руководство пользователя

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CIO DESCRIPTION
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voltage would drop below 3V. The signal can be used for user applications within the range of
3V to 12V.
As well as the other signals, DSR values are accessible within CIO communication
reports (see the ARNEP protocol description).
3.4. Output signal for disconnection of supply voltage
The only exclusively "output" signal is PWRSV (Power Save). The signal is linked to
the supply connector (see the supply connector description). It is connected as universal I/O
signal outputs. This is an open collector that switches PWRSV signal to the ground (GND).
The output is controlled by a report, similarly to I/O outputs.
The basic function is the possibility to switch off the supply in case of an application
supplied solely from the accumulator, requiring minimum possible consumption. CDA70
performs communication after which it switches the supply off. The supply has to be switched
on again by a user device in case the communication is required.
In general, this output can be used to control technology.
3.5. Technical parameters
Number of I/O signals on I/O port 5
Basic range of the analogue input supply voltage 0 to 5V
Maximum switched current of binary output 500 mA
Maximum switched voltage of binary output 30 V
3.6. Setting CIO parameters
3.6.1.
Activation of CIO signals
All CIO signals have activity feature. In case a signal is active, its value is recorded in
the CIO status report. Only when the active signal changes, CIO may automatically generate a
corresponding report. In case a signal is not set as active, no matter how big a change, it will
not generate any change feature.
3.6.2.
CIO communication parameters
The CIO block functions in every CDA70, independently of settings of user interfaces.
CIO communication parameters settings decide whether the information on measured signal
values will be sent to a remote user interface.
From the communication viewpoint, the CIO operates in two modes: in the passive
mode, CIO sends measured information only upon the request of a remote station. In the
active mode, messages are generated based on changes of measured active signals, or
regularly according to a set time period.
For the method of requesting CIO values, see the ARNEP protocol.