10 FUNCTIONS
10.5 Output Diagnostic Function
177
10
10.5
Output Diagnostic Function
Output dark test function
This function outputs test pulses to turn off external output signal (Y00 to Y0F) that are ON and diagnoses internal circuits for
failure. Such a fault as adhesion, wire breaks, and failure in a circuit can be detected. Also, the test pulse OFF time or the
number of pulses to be output that are used for one diagnosis process can be set according to the usage environment.
Operation when an error is detected
When an error is detected during output dark test diagnostics, an output dark test error (error code: 2003H) state will arise and
all outputs will be turned OFF.
For the output point where an output dark test error was detected, check it with Output dark test error detection state
(Un\G1540) because a bit of the corresponding output point in this buffer memory area turns on.
Y0
COM
0V
Y0
COM
0V
RY40PT5B(Main)
RY40PT5B(Sub)
24VDC
24VDC
Electromagnetic
contactor
Electromagnetic
contactor
Test
pulse
Test
pulse
Test
pulse
Test
pulse
Output
circuit
Output
circuit
Read-back
circuit
Read-back
circuit
Summary of Contents for MELSEC iQ-RX40NC6B
Page 1: ...MELSEC iQ R I O Module With Diagnostic Functions User s Manual Application RX40NC6B RY40PT5B ...
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Page 125: ...4 OVERVIEW 123 4 MEMO ...
Page 191: ...12 MAINTENANCE AND INSPECTION 189 12 MEMO ...
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