User`s manual

103
CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.3 Specifications
*1 Cannot be used for the QJ71C24N-R4. (Signal for the modem function.)
*2 Cannot be used for the LJ71C24(-R2).
*3 Signal for the modem function.
● Of the input/output signals to the programmable controller CPU, the signals marked with "Use prohibited" must not be
output (ON). If any of the "Use prohibited" signals is output, the programmable controller system may malfunction.
● When the modem function is not used or the QJ71C24N-R4 is used, X10 to X16 are used for the system and Y10 to Y16
cannot be used.
X1C System setting default completion, ON: Completed Y1C System setting default request, ON: Requesting
X1D Pre-defined protocol ready, ON: Ready Y1D
(Use prohibited)
X1E Q series C24 ready, ON: Accessible Y1E
X1F
Watchdog timer error (WDT error)
ON: Module error occurred
OFF: Module being normally operated
Y1F
Device
number
Signal description
Device
number
Signal description