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8 FUNCTIONS
8.3 Input Diagnostic Function
Internal input dark test function
This function outputs test pulses to the input circuit of the safety remote I/O module to detect a circuit-fixing failure. The test
pulses turn off the external input signals (X0 to X1F) that are on to detect the failure.
• The test using this function is conducted to all input signals except for the signals where "Wiring selection of
input" (parameter) is set to "0: Not used".
• The internal input dark test function is not affected by the setting of input response time.
Operation at error detection
If an error is detected by the internal input dark test, the safety remote I/O module becomes the error state (I/O data error).
For details on the error state, refer to the following.
Page 138 Error codes related to the safety remote I/O module
Setting method
The parameter setting is not required for the internal input dark test function.
NC
NC
T0 T1 X0 X1
Test pulseTest pulse
Input circuitTest pulse output circuit
Safety remote I/O module
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