Mitsubishi Electric RD62P2E - When the Coincidence Output Function Does Not Operate Normally; When a Coincidence Detection Interrupt Does Not Occur; When the Preset Cannot be Executed; When the Pulse Measurement Does Not Start

3 TROUBLESHOOTING
3.3 Troubleshooting by Symptom
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When the coincidence output function does not operate normally
When a coincidence detection interrupt does not occur
When the preset cannot be executed
When the pulse measurement does not start
Check item Action
Check whether CH1 Coincidence signal No.1 reset command (Y0) and CH1
Coincidence signal No.2 reset command (Y7) turn on.
Turn off CH1 Coincidence signal No.1 reset command (Y0) and CH1
Coincidence signal No.2 reset command (Y7).
Check whether CH1 Coincidence output point No.1 setting (Un\G4, Un\G5)
and CH1 Coincidence output point No.2 setting (Un\G6, Un\G7) are set so
that the values are out of the count range of the ring counter (ring counter
function only).
Set CH1 Coincidence output point No.1 setting (Un\G4, Un\G5) and CH1
Coincidence output point No.2 setting (Un\G6, Un\G7) so that the values fall
within the count range of the ring counter.
Check whether CH1 Coincidence signal enable command (Y2) is on. Turn on CH1 Coincidence signal enable command (Y2).
Check whether a voltage is applied to the power supply terminal for external
coincidence output.
Apply a voltage to the power supply terminal for external coincidence output.
Check whether the external wiring of the coincidence output point No.1
terminal (EQU1) and coincidence output point No.2 terminal (EQU2) is
normal.
Check the external wiring to correct the errors.
Check item Action
Check whether the intelligent function module interrupt pointer setting of the
PC parameter is incorrect.
Review and correct the intelligent function module interrupt pointer setting.
Check whether the program execution control instruction such as IMASK has
been used incorrectly.
Review and correct the program.
Check whether CH1 Counter value coincident (point No.1) (X2) and CH1
Counter value coincident (point No.2) (X6) still remain on.
Reset (off) CH1 Counter value coincident (point No.1) (X2) and CH1 Counter
value coincident (point No.2) (X6) by using CH1 Coincidence signal No.1
reset command (Y0) and CH1 Coincidence signal No.2 reset command (Y7)
with the point number matched.
Check item Action
Check whether the CPU module indicates any error. If the CPU module indicates an error, refer to the troubleshooting in the
following manual.
 MELSEC iQ-R CPU Module User's Manual (Application)
Check whether CH1 External preset request detection (X4) is on. Reset (off) CH1 External preset request detection (X4) by using CH1 External
preset detection reset command (Y5).
Check whether the external wiring of the preset input terminal is normal. Check the external wiring to correct the errors.
Check item Action
Check whether the CPU module indicates any error. If the CPU module indicates an error, refer to the troubleshooting in the
following manual.
 MELSEC iQ-R CPU Module User's Manual (Application)
Check whether the counter operation mode is set to pulse measurement
mode.
Set the counter operation mode to pulse measurement mode in Basic setting.
Check whether CH1 Count enable command (Y4) is on. Turn on CH1 Count enable command (Y4) using a program.
Check whether the external wiring of the pulse measurement terminal is
normal.
Check the external wiring to correct the errors.