User`s manual

103
CHAPTER 4 FUNCTION
4
4.2 Counter Format Selection 4.2.1 Linear counter function
4.2.1 Linear counter function
(1) Operation of the linear counter
• When linear counter is selected, pulses are counted between -2147483648 (lower limit) and 2147483647
(upper limit).
• The preset/replace function and the comparison output function can be used together.
(2) Overflow/Underflow error
• Under the linear counter, CH1 Overflow/underflow error (error code: 1100) is stored into CH1 Latest error
code (Un\G1460) when CH1 Present value (Un\G1050, Un\G1051) exceeds 2147483647 (upper limit) or
falls below -2147483648 (lower limit).
• The counting stops if an overflow/underflow error occurs, and CH1 Present value (Un\G1050, Un\G1051)
does not change from -2147483648 or 2147483647 even when pulses are input.
• An overflow/underflow error can be cleared by performing the preset/replace function. When the preset/
replace function is performed, the value in CH1 Preset value (Un\G1014, Un\G1015) is stored into CH1
Present value (Un\G1050, Un\G1051), and the counting resumes.
Though, CH1 Latest error code (Un\G1460) is held until it is reset. Reset CH1 Latest error code (Un\G1460)
by CH1 Error reset command (Un\G1480).
• Overflow/underflow errors can be checked on the System monitor screen. ( Page 253, Section 8.2)
[phone]
-2147483648
ON
ON(1)
OFF(0)
ON(1)
OFF(0)
OFF
Underflow
Overflow
0
t *1
t *1
CH1 Present value
(Un\G1050, Un\G1051)
CH1 Underflow detection flag
(Un\G1072. b0)
CH1 Overflow detection flag
(Un\G1072. b8)
CH1 Preset/replace command
(Y03)
*1 t 2ms