Mitsubishi Electric MELSEC iQ-R Series Manual page 20

[When the system is configured using a remote head module]
Step in online module change
Checks before replacement
Module removal
Module mounting
Module recognition
Module control start
*1 The status of online module change is stored.
0: Normal operation
1: Module selection in progress
2: Module selection completion
3: Module removal in preparation
4: Module removal ready
5: Module removal completion
6: Module mounting completion
7: Module recognition in progress
8: Module recognition completion
9: Module control resumption in progress
*2 If a minor error (the ERR LED turns on) has occurred before online module change, the ERR LED remains on during the module
change.
*3 A failure in the module can cause the status to be different from the description above.
*4 As a module is removed by means of the direct change, the remote head module enters the following state: the RUN LED flashes; a
module verification error occurs; and the ERR LED turns on. Even though the direct change is completed successfully, the module
verification error is not cleared and the ERR LED remains on.
*5 Turning off the ERR LED requires the error to be cleared by using the module diagnostics of the engineering tool or other means.
■How to check the ON state of 'Online module change error flag' (SM1618) with LEDs
An error in online module change causes 'Online module change error flag' (SM1618) to turn on and the error information to
be stored in 'Online module change error code' (SD1618). However, the LED status does not change. To make the LED
indicate the error, use an annunciator.
*1 Remote head modules have no annunciators.
For the error information stored in 'Online module change error code' (SD1618), refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
■If an error irrelevant to online module change has occurred
An error irrelevant to online module change during online module change results in the following behavior of the LED status:
[When the system is configured using a CPU module]
• The ERROR LED shows the same behavior as in an error state.
• The READY LED flashes if a continuation error occurs. If a stop error occurs, the LED shows the same behavior as in an
error state.
[When the system is configured using a remote head module]
• The ERR LED shows the same behavior as in an error state.
• The RUN LED flashes if a minor error occurs. If a moderate error or major error occurs, the LED shows the same behavior
as in an error state.
3 REPLACEMENT PROCEDURE
18
3.1 Specifications
Change in 'Online module
*1
changing status' (SD1617)
0
0  5
5  7
7  9
9  0
*1
LED status on remote head module
RUN LED ERR LED
ON OFF
ON  Flashing (interval OFF  ON
of 400ms)
Flashing (interval of ON
400ms)
Flashing (interval of ON
400ms)
ON  OFF
Flashing (interval of
400ms)  ON
LED status on target
*3
module
*2
RUN LED
ON
*4

OFF
OFF  ON
*5
ON