Details Of The Input Signal; Details Of The Output Signal - Mitsubishi Electric MELSEC-Q Series User Manual

4.1.2

Details of the input signal

The input signal Xn0 is Module READY flag, and it turns on while the master module is operating normally.
(It does not turn off with errors of Xn1 to Xn4.)
For each of the input signals Xn1 to Xn4, an error flag that shows the condition of the AnyWire DB A20 transmission
cable turns on.
If the transmission cable is normal, a corresponding input signal turns off, and if an error occurs, a corresponding input
signal turns on.
Xn1 to Xn3 flags turn off when the error is eliminated and then maintain the OFF state.
Xn4 maintains the ON state even when the error is eliminated.
Xn4 turns off by resetting the power or outputting the signal to Yn0. ( Page 42, Section 4.1.3)
The ON/OFF state is also indicated depending on whether the ALM LED is on or how the ALM LED flashes.
Input signal No.
Xn0
Xn1
Xn2
Xn3
Xn4
For Xn8 to XnB, enter the value set for switch 1 of the "Switch setting for I/O and Intelligent Function Module". Xn8 to
XnB are used to check the settings.
X(n+1)4 turns on when the automatic address detection function is being executed. ( Page 48, Section 5.1)
4.1.3

Details of the output signal

(1) Disconnection flag reset command output
When Disconnection flag reset command output (Yn0) is turned on from off, provided that the disconnection error
has been eliminated, the error address information can be cleared by turning off D/G terminal disconnection
(Xn4) and resetting the number of error addresses to 0.
If the error has not been eliminated, the error flag, the number of the error addresses, and error address are set.
Abnormal address information can also be cleared by supplying the power again.
(2) Automatic address detection command output
When Automatic address detection command output (Yn1) is turned on from off, the automatic address detection
function is executed. ( Page 48, CHAPTER 5)
(The automatic address detection function can be also executed using the SET switch.)
(3) Transmission waveform output command
This signal is valid when "Switch 4" of "Switch setting for I/O and intelligent function module" is set to 1.
When Transmission waveform output command (Yn2) is turned on from off, the transmission waveform of the
AnyWire DB A20 is output.
42
Module READY
(Turns OFF when a watchdog timer error occurs)
Short between D and G terminals
Short between D and 24 V terminals
24VDC is not being supplied to the master module or the voltage is low.
D/G line disconnection, a slave module error, or power is not being
supplied
Description Normal Error
ON OFF
OFF ON
OFF ON
OFF ON
OFF ON