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MELSEC-
A
3 SPECIFICATIONS
Device No. Signal name Details
RX(n+1)A Error state
This signal indicates the R2 error state.
If the R2 ERR.LED is lit, the error status (RX(n+1)A) turns ON, and when the
ERR.LED is OFF, the status turns OFF.
When an error occurs, the R2 stores the error code in the error code storage area
(
R2
1A8H to 1B2H).
When the error reset request (RY(n+1)A) is turned ON after remedying the error
cause, the error status (RX(n+1)A) can be turned OFF.
When the initialization error complete (RXn5) is ON, review the R2 initial setting and
turn ON the initialization request (RYn4) again to reinitialize the setting.
When the reinitialization is completed normally and the initialization normal complete
(RXn4) turns ON, the error state (RX(n+1)A) turns OFF.
(When the initialization error complete (RXn5) is ON, turning ON the error reset
request (RY(n+1)A) will not turn OFF the error state (RX(n+1)A).)
Error state (RX(n+1)A)
Error reset request (RY(n+1)A)
Any error cause
RX(n+1)B Remote station ready
This signal indicates that the R2 can operate. (Refer to the section for RX(n+1)9.)
ON : The R2 is in the operatable state, and the initial data read request (RY(n+1)9)
is OFF.
OFF : An R2 initialization error occurred (R2 buffer memory setting value error), or
when the initial data read request (RY(n+1)9) is turned ON.
RX(n+1)E
Intelligent device
station access
complete
This signal indicates the R2 access complete state in response to the intelligent device
station access request (RY(n+1)E).
If not using dedicated commands and directly reading/writing from the programmable
controller CPU to the master station buffer memory, when accessing to the R2 is
completed, the R2 will turn intelligent device station access complete (RX(n+1)E) ON.
With this signal, the intelligent device station access request (RY(n+1)E) will turn OFF.
Access to the intelligent
device station
Intelligent device station
access request (RY(n+1)E)
Intelligent device station
access complete (RX(n+1)E)