This chapter describes details of error occurred by using the Simple Motion module and troubleshooting.
When a trouble occurs, execute the troubleshooting in the order shown below.
Check that each module is mounted correctly.
(MELSEC iQ-R Module Configuration Manual)
Check the LEDs of the power supply module and CPU module.
(MELSEC iQ-R CPU Module User's Manual (Startup))
Check the LED status of each module to confirm whether an error does not occur in a module. (Page 574
Troubleshooting using the LEDs)
Check whether an error does not occur in a module using the module diagnostics of an engineering tool. (Page 576
Troubleshooting using the module status)
Troubleshooting using the LEDs
Primary diagnostics can be executed without the engineering tool by checking the status of the LED display, so that the range
of the trouble cause can be reduced.
The status of the Simple Motion module can be checked by the RUN LED and ERR LED. The following shows the
correspondence relation between each LED and status of the Simple Motion module.
: OFF, : ON, ●: Flashing
14.1 Troubleshooting Procedure
The axes stopped
The axes on standby
The axis in operation
Watchdog timer error
Turned ON from the positioning start until the axis stops caused by
completion, stop, or an error. (One-to-one correspondence with the BUSY
Check the error code on the module diagnosis or event history using the
engineering tool, and take a measure against the error referring to the list
of error codes.
If the RUN LED is not ON after the power is turned ON from OFF, the
module might be faulty. Therefore, it is required to exchange the module.