3 - 6 3 - 6
MELSEC-Q
3 SPECIFICATIONS
3.3.2 Details of I/O signals
This section describes the details of the QJ71AS92 I/O signals.
(1) X0: Module Ready
X0 turns ON when the QJ71AS92 enters the operation enabled status after the
power is turned ON or the CPU module is reset.
X0 turns OFF when a hardware fault occurs.
OFF : Operation disabled
ON :
Operation
enabled
ON
OFF
X0
Not yet ready to operate
Ready to operate
(2) X2: Command Completion, Y12: Command Execution Request
A request to execute the command specified for Command Buffer Request of the
buffer memory is made when Y12 turns ON. The command requested when Y12
turned ON is executed, and X2 turns ON at completion of that command. *
1
(Refer to Section 3.4.2)
Y12 ON : Command requested
X2 ON : Command completed
ON
OFF
Command
execution
ON
OFF
Y12
X2
Command Completion
(55
H
to 59
H
)
Request
Result
Command Result
(25
H
to 29
H
)
Command completion
*1: Do not turn Y12 OFF until X2 turns ON during command execution.
Downloaded from
