IDEC FC4A-C10R2 User Manual page 133

Two-phase High-speed Counter Timing Chart
Example: Reset input I2 is used. Q1 is designated as a comparison output.
Current Value D8045
Reset Status M8130
Reset Value D8046
Gate Input M8031
Comparison Output Q1
Comparison Output Reset M8030
Current Value Overflow M8131
Current Value Underflow M8132
• When reset input I2 is turned on, the D8046 reset value is set to the D8045 current value, then reset status
M8130 turns on for one scan. If reset input M8032 is turned on, reset status M8130 does not turn on.
• While gate input M8031 is on, the two-phase high-speed counter counts up or down depending on the phase dif-
ference between phase A (input I0) and phase B (input I1).
Phase A
(Input I0)
Phase B
(Input I1)
65535
65534
65533
65532
8
7
6
5
4
3
2
1
0
Phase A Input I0
Phase B Input I1
Reset Input I2
1 scan time
5
Count Up (Increment)
« FC4A M
The D8046 value at this point becomes the
reset value for the next counting cycle.
65533
Underflow
1 scan time
Phase A
(Input I0)
Phase B
(Input I1)
S U ' M
ICRO MART SER S ANUAL
5: S
PECIAL
3
Overflow
1 scan time
Count Down (Decrement)
»
F
UNCTIONS
5-13