Belden 934 692-001, Техническое руководство, Страница: 44 / 64

Diagnostic properties of the modules
44
7.2 Voltage error at the M12 slots
(sensor short-circuit)
Technical manual LioN-P/ -R PROFINET
Release 1.2 02/2016
The filter is used to avoid premature error messages when a capacitive load
is activated or an inductive load is deactivated, and during other voltage
peaks when a status changes.
When a channel is in the static state – that is, when it is permanently
activated or deactivated – the controller uses a fixed specified duration of 100
ms for filtering the error message.
7.2 Voltage error at the M12 slots (sensor short-
circuit)
On each M12 input connector of the modules, contact 1 provides a 24 V
potential for power supply. This potential is obtained from the system/sensor
voltage U
S
and monitored.
In the case of a sensor short-circuit, a voltage error is reported. Both channel
indicators of the M12 input socket light up red, and the relevant error bit for
the sensor short-circuit is set in the diagnosis bytes.
The error message is filtered by the "Surveillance-Timeout" parameter. The
same parameters as for the channel errors are also used for the voltage
errors.
7.3 Overload of output drivers
The output drivers of the modules with output functions (variants 16DO and
8DI/8DO) report an error when they detect an overload. This error is reported
by setting the relevant channel error bits in the diagnosis bytes.
Note
If both output channels of an M12 slot are activated when a channel error
occurs, the controller locks both channels, even if only one channel is
affected by the error. If only one channel is activated, the controller only
locks this one. Locked channels are deactivated and remain in the
Off
state
if you do not reset them using the controller.