Items and operators of the PSRmodular Software
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Parameters
Input Type – Double NO (double N/O contact channel): enables the connection of two-hand opera-
tion with one N/O contact (NO) to each pushbutton (EN 574 type IIIA).
– Quad NC-NO: enables the connection of two-hand operation with a pair of N/O con-
tacts or N/C contacts (NO/NC) for each pushbutton (EN 574 type IIIC).
Output Test Enables the selection of clock signals that are to be connected to the contacts for two-hand
operation. These additional diagnostics enable the detection of short circuits and cross-cir-
cuits between the cables. To activate these diagnostics, the clock signals must be config-
ured in the “Property” window of the relevant function block.
StartUp Test If this option is selected, a function test of two-hand operation is required before the enable.
This test requires the two-hand control device to be simultaneously pressed within 500 ms
and then released in order to activate the “O
UT” output. This check is only required on ma-
chine startup.
Filter (ms) This option enables external input signals to be filtered. The filter can be configured with a
value between 3 and 250 ms and helps suppress contact chatter. The length of the filter time
affects the calculation of the response time of the safety function.
Enable Error Out When this parameter is selected, an output (“E
RROR”) is made available which signals that
an error has been detected by the function block.
Item Description A 24-character text description of the function or the name can be entered here. The text is
displayed above the function block.
5.1.2.11 NETWORK_IN function block (line emergency stop)
This function block implements an input interface for a network. To do this, the “O
UT” output
of the “NETWORK_IN” block must be connected to the “N
ETWORK_IN” input of the “NET-
WORK” operator.
A typical application of this block combination can be used for the evaluation of line emer-
gency stop signals (daisy chain). For further information, see section “NETWORK”.
Figure 5-38 “NETWORK_IN” function block (line emergency stop)
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