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MELSEC-
A
3 SPECIFICATIONS
Device No. Signal name Details
RXn6
OS reception area
clear complete
The OS reception area clear request (RYn6) is turned ON to abort the data in the R2
OS reception area.
When OS reception area clear is completed, the R2 turns the OS reception area clear
complete (RXn6) ON, so the OS reception area clear request (RYn6) will turn OFF.
R2 clears the OS
reception area.
OS reception area
clear complete (RXn6)
OS reception area
clear request (RYn6)
RXn7
EEPROM function
normal complete
RXn8
EEPROM function
error complete
When the R2 EEPROM function is executed, after the data is read into the R2 buffer
memory (1C0
H), EEPROM function request (RYn7) turns ON.
When completed normally, EEPROM function normal complete (RXn7) turns ON.
When completed abnormally, EEPROM function error complete (RXn8) turns ON.
When these signals turn ON, EEPROM function request (RYn7) turns OFF.
EEPROM function request (RYn7)
EEPROM function normal complete
(RXn7)
or EEPROM function error complete
(RXn8)
R2 executes
EEPROM function.
RXn9
CS (CTS)
signal
RXnA
DR (DSR)
signal
RXnB
Signal
status
CD signal
This signal indicates the control signal status (CS, DR, CD signal) during RS-232-C
communication with an ON or OFF state.
RXnC
RXnD
General-purpose
external input signal
This signal indicates the status of the R2 general-purpose external input (XC, XD)
status with an ON or OFF state.
RXnC: Corresponds to XC RXnD: corresponds to XD
RX(n+1)9
Initial data read
complete
When writing in the initialization data before executing initialization, the initial data read
request (RY(N+1)9) turns ON, and the initialization data is written to the master station.
At this time, remote station ready (RX(n+1)B) turns OFF.
When the writing is completed, initial data read complete (RX(n+1)9) turns ON, and
the initial data read request (RY(n+1)9) turns OFF.
When these turn OFF, initial data read complete (RX(n+1)9) turns OFF, and remote
station ready (RX(n+1)B) turns ON.
R2 writes initialization
data to master station.
Initial data read complete
(RX(n+1)9)
Remote station ready (RX(n+1)B)
Initial data read request (RY(n+1)9)