Details Of I/O Signals - Mitsubishi QD60P8-G User Manual

3 SPECIFICATIONS

3.3.2 Details of I/O signals

Device
Signal name
No.
X0 Module READY
Operating
X1 condition setting
complete flag
X8 CH1
X9 CH2
XA CH3
XB CH4
Error
occurrence
XC CH5
XD CH6
XE CH7
XF CH8
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The I/O signals of the QD60P8-G are detailed below.
(1) Details of input signals (QD60P8-G
CPU)
The following table indicates the ON/OFF timings and functions of the input
signals.
• This signal judges whether the QD60P8-G is normal or
OFF: Not
abnormal in the sequence program. This signal turns ON
Prepared/
when the module starts normally at power-on or reset
Watch dog
operation.
timer error
• This signal turns OFF at occurrence of a watch dog timer
ON : Prepared
error.
• This signal is used as an interlock for turning ON/OFF the
operating condition setting request flag (Y1) when the function,
such as the comparison output function, is selected or the
setting value is changed.
• When this signal is OFF, input pulses are not counted.
• After confirming that the operating condition setting is
completed (this signal has turned ON), turn ON the count
enable signal (Y18 to Y1F) to start pulse counting.
OFF: Operating
condition
setting
ON : Operating
condition
Module
setting READY
complete
Operating condition
setting complete flag
Operating condition
setting request flag
Count enable
• This signal turns ON if an error exists in the overflow detection
or initial setting data. (The details of the error can be confirmed
from the "system monitor" screen of GX Developer.)
• This signal turns OFF when the error reset request (Y8 to YF)
is turned ON.
• The "error code" is stored into the buffer memory of the
corresponding channel (refer to Section 3.4.2 for details).
OFF: No error
occurrence
ON : Error
occurrence
*1: Initial value set at power-on or when the programmable controller CPU is reset.
OFF
(X0)
OFF
(X1)
OFF
(Y1)
OFF
(Y18 to Y1F)
Error occurrence
OFF
(X8 to XF)
OFF
Error reset request
(Y8 to YF)
Error code is read during this period.
programmable controller
Details
Executed by QD60P8-G
Executed by sequence program
ON
ON
ON
ON
Executed by QD60P8-G
Executed by sequence program
ON
ON
MELSEC-Q
Initial
value
*1
OFF
OFF
OFF
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