Safety Outputs - Omron DEVICENET SAFETY - 03-2008 Operation Manual

Description of Safety Functions
Input Delays
ON Delay
OFF Delay
1-4-3

Safety Outputs

Safety Outputs with Test Pulses (Output Circuit Diagnosis)
IMPORTANT To prevent the test pulse from causing the connected device to malfunction,
Dual Channel Setting
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.
ON
IN
OFF
ON
Remote I/O data
Safety input
OFF
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.
ON
IN
OFF
ON
Remote I/O data
Safety input
OFF
When the output is ON, the test pulse is turned OFF for 470 µ s in a cycle of
648 ms. Using this function, short-circuits between output signal lines and the
power supply (positive side) and short-circuits between output signal lines can
be detected.
If an error is detected, the safety output data and the individual safety output
status will turn OFF.
pay careful attention to the input response time of the device.
ON
OUT
OFF
When both channels are normal, the outputs can be turned ON.
ON delay
OFF delay
580 µs
648 ms
Section 1-4
15