Mitsubishi Electric MELSEC-Q Series User Manual page 104

(4) DP/DN disconnection error (Xn4)
This signal turns on when disconnection occurs in the transmission cables (DP, DN) or the slave module is
disconnected.
(a) Turning off DP/DN disconnection error (Xn4)
After eliminating the disconnection in the transmission cables (DP, DN) or that of the slave module, perform
either of the following operations.
Until then, DP/DN disconnection error (Xn4) remains on.
• Reset the CPU module or power off and on the system.
• Turn on and off Error flag clear command (Yn0).
For how to deal with disconnection of the transmission cables (DP, DN) or that of the slave module, refer to the
following. ( Page 95, Section 10.5)
(5) Slave module alarm signal (X(n+1)0)
This signal turns on when a status error in a slave module occurs or an error occurs in the address setting of the
slave module. (The status error includes an I/O disconnection and short circuit.)
For details about the target slave module's addresses and alarms, refer to Number of the alarm IDs (Un\G9984)
and Alarm ID information storage area (Un\G9985 to Un\G10112).
( Page 106, Appendix 2 (8), Page 106, Appendix 2 (9))
(a) Turning off Slave module alarm signal (X(n+1)0)
After eliminating the status error of the slave module or setting the address of the slave module again, perform
either of the following operations.
Until then, Slave module alarm signal (X(n+1)0) remains on.
• Reset the CPU module or power off and on the system.
• Turn on and off Error flag clear command (Yn0).
For how to eliminate the status error in the slave module, refer to the following. ( Page 95, Section 10.5)
(6) Parameter access completion flag (X(n+1)1)
This signal turns on when the parameter access is completed.
(7) Parameter access error (X(n+1)2)
This signal turns on when an error occurs in the parameter access.
The latest error codes are stored in Latest error code storage area (Un\G10256) and the target IDs of the error
codes are stored in Latest error ID storage area (Un\G10257).
The error address is stored in Alarm ID information storage areas (Un\G9985 to Un\G10112) as the alarm
information. ( Page 106, Appendix 2 (9))
(a) Turning off Parameter access error (X(n+1)2)
After eliminating the error, perform either of the following operations.
Until then, Parameter access error (X(n+1)2) remains on.
• Reset the CPU module or power off and on the system.
• Turn on and off Error flag clear command (Yn0).
For how to remove the parameter access error, refer to the following. ( Page 95, Section 10.5)
(8) Automatic address detection flag (X(n+1)4)
The signal remains on after start of automatic address detection operation until the end of the operation.
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