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3
SPECIFICATIONS
3.3 I/O Signals to the Programmable Controller CPU
3.3.2 Functions of I/O signals
3 - 11
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
PROCEDURES AND
SETTINGS BEFORE
OPERATION
5
FUNCTIONS
6
UTILITY PACKAGE (GX
Configurator-CT)
7
PROGRAMMING
8
TROUBLESHOOTING
(3) External preset request detection (X08)
• Turns ON when the preset input terminal (PRST) is turned ON.
• To turn OFF the external preset request detection (X08), turn ON the external
preset request detection reset command (Y08).
• The preset cannot be executed while the external preset request detection (X08)
is ON.
Figure 3.9 Operation of the external preset request detection (X08)
(4) During continuous comparison No.1 execution (X09), during continuous
comparison No.2 execution (X0A)
• Turns ON during execution of the continuous comparison function. (Refer to
Section 5.3.2.)
(5) Error occurrence (X0D)
• Turns ON when an error occurs.
• To turn OFF the error occurrence (X0D), fix the cause of the error and then turn
ON the error reset command (Y0D).
Figure 3.10 Operation of the error occurrence (X0D)
(6) Warning occurrence (X0E)
• Turns ON when a warning occurs.
• To turn OFF the warning occurrence (X0E), fix the cause of the warning and then
turn ON the error reset command (Y0D).
Figure 3.11 Operation of the warning occurrence (X0E)
100
0 100
t*
*t 2ms
OFF
ON
ON
ON
OFF
OFF
Operation by the QD64D2
Operation by the sequence program
Preset value setting
(Un\G4 and 5)
Preset input terminal
(PRST)
External preset request detection
(X08)
External preset request
detection reset command
(Y08)
Present value
(Un\G12 and 13)
0 100 0
OFF
ON
OFF
ON
t*
* t 2ms
Operation by the QD64D2
Operation by the sequence program
Error reset command
(Y0D)
Error code
(Un\G18)
Error occurrence
(X0D)
0 31 0
OFF
ON
OFF
ON
t*
* t 2ms
Operation by the QD64D2
Operation by the sequence program
Error reset command
(Y0D)
Warning code
(Un\G19)
Warning occurrence
(X0E)