n
With the
channel activation
channel groups may be activated or deactivated. With
channel activation
= 1 the corresponding channel group is in "standard operation".
n
Deactivated channel groups (
channel activation
= 0) permanently supply a logical 1
as input information to the safety PLC in the cyclic data exchange as long as the
module is not passivated. This serves to bridge non-existent sensors, e.g. during
commissioning or with machine variants, without adapting the safety program in the
safety PLC.
CAUTION!
Deactivation of channel groups represents a potentially dangerous condi-
tion!
The usage of
channel activation
must already be taken into account when
planning and creating the safety program!
Errors on the input signals can be suppressed by specifying an
input smoothing time
.
This is used for debouncing sensors. If there is an active safety sensor connected to an
input, which tests the wired lines by test pulses, then the
input smoothing time
must
always be greater than the max. test pulse length of the sensor. Please also refer to the
Chap. 3.7 ‘Connection examples’ page 91
The input smoothing time is included in the calculation of the max.
system response time!
Chap. 2.11 ‘Response time’ page 58
n
When using sensors with mechanical or electromechanical contacts, to detect a short
circuit to DC 24V, for each channel group a test pulse can be activated. For test pulse
output the System SLIO safety module has a DC 24V power supply output for each
channel group.
n
When activated (
test pulse activation
= 0) the DC 24V power supply output is shortly
set to 0V at defined intervals. Here the return of the test pulse is observed by each
input channel, provided the sensor is currently closed. Here wiring errors or short and
cross circuits can be detected.
n
This function is to be deactivated (
test pulse activation
= 1) if there is an active sensor
(e.g. light array) connected to the input with integrated electronic and semiconductor
output. Here the active sensor serves for the observation of the connected lines by
generating the test pulse to check the switch-off ability. Here the input smoothing time
of the corresponding safety input must be greater than the test pulse length of the
output of the safety sensor (vendor information). Please also refer to the "Connection
Chap. 3.7 ‘Connection examples’ page 91
Here for each channel group you can set the evaluation of the inputs as 1-channel or 2-
channel evaluation:
n
With "1-channel" evaluation connect a sensor with 1 output one sensor with one
output to one channel.
n
For "2-channel" evaluation, connect a sensor with 2 outputs to a channel group. Here
the sensor supplies by both connectors the same signal state. With "2-channel" eval-
uation more short and cross circuits may be detected as with "1-channel" evaluation.
This kind of 2-channel connection allows to achieve higher safety levels like SIL 3 and
PL e. Please also refer to the "Connection examples”.
Channel activation
Input smoothing time
Test pulse activation
Evaluation of the inputs
VIPA System SLIO
Product description
SDI 4xDC 24V - FSoE Parameter record set > FSoE application parameters
HB300 | SM-S | 02x-1SD10 | en | 20-02
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