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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 - 13
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
(10)Preset command (Y04)
• Turn ON the preset command (Y04) to execute the preset function (Refer to
Section 5.4).
• Check that the present value (Un\G12 and 13) has been changed, then turn OFF
the preset command (Y04).
• While the external preset request detection (X08) is ON, the preset cannot be
executed by the preset command (Y04).
Figure 3.14 Operation of the preset command (Y04)
(11)Subtraction count command (Y05)
• Turn ON to execute the subtraction count at 1-phase input mode.
• In the 1-phase pulse input mode, the subtraction count is executed when the
phase B pulse or the subtraction count command (Y05) is turned ON.
• When the pulse input mode is 1 multiple of 1 phase, counting is executed as
shown below.
• For the addition count, check that the phase B pulse and the subtraction count
command (Y05) are turned OFF.
Figure 3.15 Operation of the subtraction count command (Y05) (when the pulse input mode is 1 multiple of 1 phase)
(12)Count enable command (Y06)
• Turn ON the count enable command (Y06) to start the count operation.
• When the pulse input mode is 1 multiple of 1 phase, counting is executed as
shown below.
Figure 3.16 Operation of the count enable command (Y06) (when the pulse input mode is 1 multiple of 1 phase)
OFF
ON
* t 2ms
t *
100
1000
Operation by the QD64D2
Preset value setting
(Un\G4 and 5)
Preset command
(Y04)
Present value
(Un\G12 and 13)
A
B
ON
OFF
ON ON
99 98 9710099
Subtraction count command
(Y05)
Present value
(Un\G12 and 13)
A
B
ON
210
Count enable command
(Y06)
Present value
(Un\G12 and 13)