Omron DST1 Series, Руководство по эксплуатации, Страница: 31 / 114

1-3 Functions
1-3-2 Safety Inputs
Item Description
Any of the following four modes can be selected according to the external input
device for each input.
Not Used The safety input is not used.
(External input device not connected.)
Test Pulse from Test
Output
Specifies connecting a device with a contact output in
combination with a test output. When this mode is
selected, select the test output to use for the test
source and then set the test output mode to Pulse Test
Output . When these settings are made, contact
between the input signal line and the power supply
(plus) and short circuits with other input signal lines can
be detected.
Used as Safety Input Specifies connecting a safety device with a
semiconductor output, such as a light curtain.
Input channel
mode
Used as Standard Input Specifies connecting a standard device (i.e., a
non-safety device).
The consistency between signals on two channels can be evaluated. Any of the
following settings can be selected. The discrepancy time is set at the same time.
Single Channel Specifies using Single Channel Mode. If Single
Channel is selected, the safety input that would be
paired for the dual channel parameter will also be set to
Single Channel Mode.
Dual Channel Equivalent Specifies using the Dual Channel Equivalent Mode with
a paired safety input.
Dual Channel
Complementary
Specifies using Dual Channel Complementary Mode
with a paired safety input.
Dual channel
mode
Discrepancy Time This setting is used to monitor the time in discrepancies
in the logic between two channels set as Dual Channel
Equivalent or Dual Channel Complementary .
ON Delay An input signal is treated as being OFF during the ON
delay setting time (0 to 126 ms, in increments of 6 ms)
after the input contact’s rising edge. The input will turn
ON only if the input contact remains ON after the ON
delay time has elapsed. This helps prevent chattering
of the input contacts.
Input delays
OFF Delay An input signal is treated as being ON during the OFF
delay setting time (0 to 126 ms, in increments of 6 ms)
after the input contact’s falling edge. The input will turn
OFF only if the input contact remains OFF after the
OFF delay time has elapsed. This helps prevent
chattering of the input contacts.
Input error latch
time
The OFF status is held for at least the input error latch time (0 to 65,530 ms, in
increments of 10 ms) when the individual safety input status turns OFF.
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