Rockwell Automation 1732DS-IB8 User Manual page 121

Safety Inputs
Item Description
Input Channel Mode Any of the following modes can be selected according to the external input device for each input.
The consistency between signals on two channels can be evaluated. The following settings can be selected.
Dual-channel Mode
The discrepancy time is set for Dual-channel operation.
ON delay -
Input Delays
An input signal is treated as being OFF during the ON delay setting time (0...126 ms, in increments of 6 ms)
after the input contact's rising edge.
The input turns ON only if the input contact remains ON after the ON delay time has elapsed.
This helps prevent chattering of the input contacts.
OFF delay -
An input signal is treated as being ON during the OFF delay setting time (0...126 ms, in increments of 6 ms)
after the input contact's falling edge.
The input turns 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 An input or test output error is held for a minimum of this amount of time.
This time should be set to ensure that the Safety Controller recognizes the error (0...65,530 ms, in increments
of 10 ms).
• Not used - An external input device is not connected.
• Safety pulse test - Used with a contact output device in combination with a test output. Using this
setting, short circuits between input signal lines and the power supply (positive side) and short circuits
between input signal lines can be detected.
• Safety - A solid-state output safety sensor is connected.
• Standard - A standard device is connected, for example, a reset switch.
• Single channel - Used as a single channel.
• Dual-channel equivalent - Used as a dual channel pair. Status is OK when both channels are ON or
OFF.
• Dual-channel complementary - Used as dual channel. Status is OK when one channel is ON and the
other channel is OFF.
List of Functions
Publication 1791DS-UM001H-EN-P - April 2009
117