X20(c)SC2212
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Data sheet V1.141 X20(c)SC2212 Translation of the original documentation
Switch-on filter
When switching from 0 to 1, the filtered status is collected with a fixed offset to the network cycle and transferred.
The filter value can be configured (limit values are listed in the technical data).
Danger!
Errors that result from cross faults to other signals are detected by the module within the error detec-
tion time at the latest. By default, the switch-on filter is set to the error detection time value, which
filters out faulty signals caused by possible cross faults. If the switch-on filter is set to a value smaller
than the error detection time, faulty signals can cause temporary switch-on pulses to occur.
Information:
The actual effective filter depends on the I/O cycle time of the module. The actual effective filter can
therefore deviate below the input value by the I/O cycle time (see the technical data for the module). If
filter times are set less than the I/O cycle time of the module, no filter is effective.
Switch-off filter
When switching from 1 to 0, the filtered status is collected with a fixed offset to the network cycle and transferred.
The switch-off filter can be configured separately. This makes it possible to use the switch-off filter in actual appli-
cations (e.g. testing gaps of the light curtain) and to shorten response times. The filter value can be configured
(limit values are listed in the technical data).
Danger!
Configuring a switch-off filter lengthens the safety response time!
The configured filter value must be added to the total response time once or twice depending on the
firmware version (for details, see the chapter "Filters" in the technical data sheet).
Configuring a switch-off filter causes signals with a low phase shorter than the switch-off filter to be
filtered out. If this results in a problem concerning safety functionality, then the switch-off filter must
be set to 0.
To minimize the effect of EMC interference, the max. line lengths between the pulse output and input
specified in the technical data must be taken into account.
When connecting devices with OSSD signals (signals with test pulses), you must select a switch-off
filter in each case that is substantially smaller than the repeat rate of the test pulses.
Information:
The actual effective filter depends on the I/O cycle time of the module. The actual effective filter can
therefore deviate below the input value by the I/O cycle time (see the technical data for the module). If
filter times are set less than the I/O cycle time of the module, no filter is effective.
Danger!
If "Pulse Mode = External" is used in the channel configuration, then an additional TOFF filter with
5 ms is enabled in the module. The corresponding information regarding the TOFF filter must also be
considered when using the "Pulse Mode = External" setting.
14 Enabling principle
Each output channel has an additional standard switching signal that can be used to access the output channel
from the standard application. As soon as the output channel has been enabled from a safety-related point of view
(the setting of the channel is enabled from the point of view of the safety technology), the output channel can be
set or cleared in the standard application independently of the additional safety-related runtime and jitter times.
Use of the enabling principle is specified in the I/O configuration in Automation Studio.