5-88
Error detection function
Input monitoring and grounding detection
When an error is detected between the dual channel inputs, the SG-ONE changes to the
Protection state and displays "1" on the error LED display. The conditions to be detected as input
errors are shown below.
(1) When an input monitoring error detection time (0.5 s) is exceeded during the 2 input conditions
is the same condition (namely ON/ON or OFF/OFF).
(2) When there is an independent condition change of 1 of the inputs.
(3) When the ON state input circuit has been grounded.
The input LEDs blink and the monitoring output (Y
m
) sends pulses (1Hz), to notify the operator of
the corresponding input. See Fig. 5-6.
Short circuit
When an input error, such as short circuit or circuit failure, is detected, the SG-ONE changes to
the Stop state and displays "2" on the error LED display.
Noise detection filter
When the SG-ONE is used in an environment with severe noise, the SG-ONE changes to the
Stop state and displays "9" on the error LED display.
Warning
Safety check signals (pulses signals) are supplied from the drive circuits (T
n
) to diagnose
connected safety devices and input circuits. Safety check signals can not be used as power for
connected devices.
Summary of Contents for SG EASY One
Page 1: ...Safety Control Unit INSTRUCTION MANUAL...
Page 34: ......
Page 70: ...5 28 Using an DATALOGIC AUTOMATION light curtain SE series as S1 S2...
Page 71: ...5 29 Timing chart Logic 3...
Page 74: ...5 32 Logic circuit Logic 4...
Page 80: ...5 38 Timing chart Logic 4...
Page 81: ...5 39...
