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MELSEC-Q
3 SPECIFICATIONS
3.3.2 Functions of I/O signals
The details of the I/O signals for the QD62(E/D) are listed in the table below.
(1) Input signals
Device No.
CH1 CH2
Signal name
QD62(E/D) CPU module
Description
X0 Module ready
• This signal turns on when the QD62(E/D) is ready for counting operation after the
CPU module is powered on or reset.
• Counting operation is not performed while this signal is off.
X1 X8 Counter value large (point No.1)
• This signal turns on when the following condition is met.
• This signal turns off when the following condition is met.
X2 X9
Counter value coincidence (point
No.1)
• This signal turns on when the following condition is met. And then, the on status will
be latched.
• This signal is turned off by CH Coincidence signal No.1 reset command (Y0, Y8).
• This signal is on immediately after the CPU module is powered on or reset because
both of the following buffer memories are set to "0".
CH
Present value (Un\G2, Un\G3, Un\G34, Un\G35)
CH
Coincidence output point set No.1 (Un\G4, Un\G5, Un\G36, Un\G37)
X3 XA Counter value small (point No.1)
• This signal turns on when the following condition is met.
•This signal turns off when the following condition is met.
X4 XB
External preset request
detection
• This signal is turned on by a preset command from an external input terminal. And
then, the on status will be latched.
• This signal is turned off by CH
External preset detection reset command (Y5, YD).
X5 XC Counter value large (point No.2)
• This signal turns on when the following condition is met.
• This signal turns off when the following condition is met.
X6 XD
Counter value coincidence (point
No.2)
• This signal turns on when the following condition is met. And then, the on status will
be latched.
• This signal is turned off by CH Coincidence signal No.2 reset command (Y7, YF).
• This signal is on immediately after the CPU module is powered on or reset because
both of the following buffer memories are set to "0".
CH
Present value (Un\G2, Un\G3, Un\G34, Un\G35)
CH
Coincidence output point set No.2 (Un\G6, Un\G7, Un\G38, Un\G39)