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 - Mitsubishi Electric RD62P2E Application User's Manual

When the coincidence output function does not operate normally

Check item
Check whether CH1 Coincidence signal No.1 reset command (Y0) and CH1
Coincidence signal No.2 reset command (Y7) turn on.
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).
Check whether CH1 Coincidence signal enable command (Y2) is on.
Check whether a voltage is applied 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.

When a coincidence detection interrupt does not occur

Check item
Check whether the intelligent function module interrupt pointer setting of the
PC parameter is incorrect.
Check whether the program execution control instruction such as IMASK has
been used incorrectly.
Check whether CH1 Counter value coincident (point No.1) (X2) and CH1
Counter value coincident (point No.2) (X6) still remain on.

When the preset cannot be executed

Check item
Check whether the CPU module indicates any error.
Check whether CH1 External preset request detection (X4) is on.
Check whether the external wiring of the preset input terminal is normal.

When the pulse measurement does not start

Check item
Check whether the CPU module indicates any error.
Check whether the counter operation mode is set to pulse measurement
mode.
Check whether CH1 Count enable command (Y4) is on.
Check whether the external wiring of the pulse measurement terminal is
normal.
Action
Turn off CH1 Coincidence signal No.1 reset command (Y0) and CH1
Coincidence signal No.2 reset command (Y7).
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.
Turn on CH1 Coincidence signal enable command (Y2).
Apply a voltage to the power supply terminal for external coincidence output.
Check the external wiring to correct the errors.
Action
Review and correct the intelligent function module interrupt pointer setting.
Review and correct the program.
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.
Action
If the CPU module indicates an error, refer to the troubleshooting in the
following manual.
 MELSEC iQ-R CPU Module User's Manual (Application)
Reset (off) CH1 External preset request detection (X4) by using CH1 External
preset detection reset command (Y5).
Check the external wiring to correct the errors.
Action
If the CPU module indicates an error, refer to the troubleshooting in the
following manual.
 MELSEC iQ-R CPU Module User's Manual (Application)
Set the counter operation mode to pulse measurement mode in Basic setting.
Turn on CH1 Count enable command (Y4) using a program.
Check the external wiring to correct the errors.
3.3 Troubleshooting by Symptom
3 TROUBLESHOOTING
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