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3.3 I/O Signals to the Programmable Controller CPU
3.3.2 Functions of I/O signals
3
SPECIFICATIONS
3.3.2 Functions of I/O signals
The following indicates the details of I/O signals of the QD64D2.
In this section, I/O numbers (X/Y) and buffer memory addresses are listed only for channel
1.
For I/O numbers and buffer memory addresses used for channel 2, refer to Section 3.3.1
and Section 3.4.1.
(1) Module READY(X00)
• Turns ON at reset or power-on of the programmable controller CPU when the
QD64D2 is ready for counting, and the counting process is executed.
• Turns OFF when a watchdog timer error or an error which affects the system
(Error code: 810 to 860) occurs.
• When the module READY (X00) is OFF, the counting is not executed.
• Use this signal for an interlock of a sequence program.
Figure 3.6 Operation of the module READY (X00)
OFF
ON
Operation by the QD64D2
Operation by the sequence program
QD64D2 status
Module READY
(X00)
In
preparation
Ready
Watchdog timer error or an error
that affects the system