Inovance MD330H - Page 69

Operation, Display and Application Examples MD380 User Manual
- 68 -
4.8.11 Use of the Counting Function
The count value needs to be collected by the DI terminal that is allocated with function 25.
When the count value reaches FB-08 (Set count value), the DO terminal allocated with
function 8 (Set count value reached) becomes ON. Then the counter stops counting.
When the count value reaches FB-09 (Designated count value), the DO terminal allocated
with function 9 (Designated count value reached) becomes ON. The counter continues to
count until "Set count value" is reached.
Figure 4-29 Parameter setting in the counting mode
F
4-00 to F4-09
= 25
(Counting
pulses input)
F4-00 to F4-09
= 26
(Counting reset)
Counting
pulses
Counting
reset
U0-12
(counting value)
Fb-09
(Designated
counting value)
≥
F5-00 to F5-05
= 8 (Designated
counting value reached)
Reset
Clear
to 0
After the designated
counting value is
reached, set the DO
terminal to 1.
≥
Fb-08
(Set counting
value)
F5-00 to F5-05
= 9 (Set counting
value reached
)
Reset
After the set counting
value is reached, set
the DO terminal to 1.
Counting reset input
Designated counting
value reached output
Set counting value
reached output
Counting
pulses input
U0-12: Counting value
Fb-09 = 11
U0-12 = 11
1 2 3 10 11 12
U0-12 = 0
19 20 21
Fb-08 = 20
U0-12 = 20
1 2
Note
• FB-09 (Designated count value) must not be greater than FB-08 (Set count value).
• DI5 must be used when the pulse frequency is high.
• The DO terminal that is allocated with function 9 (Designated count value reached) and the DO
terminal that is allocated with function 8 (Set count value reached) must not be the same.
• In the RUN/STOP state of the AC drive, the counter will not stop until "Set count value" is
reached.
• The count value is retentive at power failure.
• An automatic stop system can be implemented if the signal output by the DO terminal with the
function (Count value reached) is fed back to the DI terminal of the AC drive with stop function.