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5
FUNCTIONS
5.2 Selecting a Counter Format
5.2.2 Selecting the ring counter
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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
5.2.2 Selecting the ring counter
(1) Ring counter operation
(a) For the ring counter, the counting is executed repeatedly within the range set by
the ring counter lower limit value (Un\G0 and 1) and the ring counter upper limit
value (Un\G2 and 3).
Overflow error does not occur.
Figure 5.2 Operation image of the ring counter
(b) The following functions can be used in combination.
• Counter value comparison function (Coincidence output function, continuous
comparison function)
• Coincidence detection interrupt function
• Preset function
• Latch counter function
+2147483647
Ring counter upper limit value (Un\G2 and 3)
Ring counter lower limit value (Un\G0 and 1)
-2147483648
Present value
Addition
Subtraction
0