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MELSEC-
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3 SPECIFICATIONS AND FUNCTIONS
3.4 Specifications of input/output signals for master module
3.4.1 List of input/output signals
The D75P2 uses 128 input points and 128 output points for exchanging data with the
master module.
The input/output signal assignment and signal names are shown below.
Device RX refers to the signals input from the D75P2 to the master module, and
device RY refers to the signals output from the master module to the D75P2.
Signal direction: D75P2 master module Signal direction: Master module D75P2
Device No. Signal name Device No. Signal name
RXn0 D75P2 READY
RYn0 to
RYnF
Use prohibited
RXn1 Axis 1 start complete
RXn2 Axis 2 start complete
RXn3 Use prohibited
RXn4 Axis 1 BUSY
RXn5 Axis 2 BUSY
RXn6 Use prohibited
RXn7 Axis 1 positioning complete
RXn8 Axis 2 positioning complete
RXn9 Use prohibited
RXnA Axis 1 error detection
RXnB Axis 2 error detection
RXnC Use prohibited
RXnD Axis 1 M code ON
RXnE Axis 2 M code ON
RXnF Use prohibited
RX(n+1)0 Axis 1 speed limiting flag RY(n+1)0 Axis 1 positioning start
RX(n+1)1 Axis 1 speed change processing flag RY(n+1)1 Axis 2 positioning start
RX(n+1)2 Axis 1 drive unit READY RY(n+1)2 Use prohibited
RX(n+1)3 Axis 1 zero point signal RY(n+1)3 Axis 1 stop
RX(n+1)4 Axis 1 in-position signal RY(n+1)4 Axis 2 stop
RX(n+1)5 Axis 1 near-point dog signal RY(n+1)5 Use prohibited
RX(n+1)6 Axis 1 stop signal RY(n+1)6 Axis 1 forward run JOG start
RX(n+1)7 Axis 1 upper limit RY(n+1)7 Axis 1 reverse run JOG start
RX(n+1)8 Axis 1 lower limit RY(n+1)8 Axis 2 forward run JOG start
RX(n+1)9 Axis 1 external start signal RY(n+1)9 Axis 2 reverse run JOG start
RX(n+1)A
Axis 1 speed/position changeover
signal
RY(n+1)A
to
RY(n+1)F
Use prohibited
RX(n+1)B Axis 1 deviation counter clear status
RX(n+1)C Axis 1 speed controlling flag
RX(n+1)D
Axis 1 speed/position changeover latch
flag
RX(n+1)E Axis 1 command in-position signal
RX(n+1)F Axis 1 zero point return request flag
n: Address assigned to the master module by station number setting