147
CHAPTER 8 FUNCTIONS
8
8.12 L
atch C
ounter/
preset/replace Fun
ction
●
The count value cannot be replaced with the preset value while CH
External preset/replace (Z Phase) request
detection (RX23, RX3B) is on.
Replace the value after CH
External preset/replace (Z Phase) request detection (RX23, RX3B) turns off by turning on
CH
External preset/replace (Z Phase) request detection reset command (RY23, RY3B).
●
Have a
Δ
T
1
or longer interval after changing CH
Preset value setting (RWw14 to RWw15, RWw2C to RWw2D) until the
value is replaced since there are maximum of
Δ
T
1
delay until change in the preset value is reflected.
*1
●
When the latch counter function is performed by CH
Function input terminal (FUNC1, FUNC2), the operation response
time follows CH
Function input response time setting (address: 0129
H
.b2 to b3, 0149
H
.b2 to b3). Since CH
Latch
count value (RWr12 to RWr13, RWr2A to RWr2B) is updated synchronizing with the internal control cycle, a maximum of
delay time shown below occurs until the acquired value is stored.
•
Δ
T
1
*1
+ Setting time of CH
Function input response time setting (address: 0129
H
.b2 to b3, 0149
H
.b2 to b3)
*1
For
Δ
T
1
, refer to Page 283, Appendix 4.
No.
Description
1)
Counting starts by turning on CH
Count enable command (RY24, RY3C).
2)
The value in CH
Present value (RWr10 to RWr11, RWr28 to RWr29) is stored in CH
Latch count value (RWr12 to RWr13,
RWr2A to RWr2B), and the value in CH
Preset value setting (RWw14 to RWw15, RWw2C to RWw2D) is stored in CH
Present
value (RWr10 to RWr11, RWr28 to RWr29) at the rising edge of CH
Function input terminal (FUNC1, FUNC2). After CH
Latch
count value (RWr12 to RWr13, RWr2A to RWr2B) is updated, CH
Update flag (Latch count value) (RX29, RX41) turns on.
3)
Set any values to CH
Preset value setting (RWw14 to RWw15, RWw2C to RWw2D).
4)
Counting stops by turning off CH
Count enable command (RY24, RY3C).
5)
When CH
Update flag reset command (Latch count value) (RY28, RY40) is turned off then on, the high-speed counter module
turns off CH
Update flag (Latch count value) (RX29, RX41) and turns on CH
Update flag reset completed (Latch count value)
(RX28, RX40).
After that, CH
Update flag reset completed (Latch count value) (RX28, RX40) turns off when CH
Update flag reset command
(Latch count value) (RY28, RY40) is turned off.
6)
Counting resumes by turning on CH
Count enable command (RY24, RY3C).
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