IDEC FT1A Series User Manual page 106

5: S F
PECIAL UNCTIONS
Example: Group 1, number of preset values is 3, set to device address D0
When the current value matches preset value 1, Current Preset Value Number becomes 2 and 3 is stored in Next Preset
Value Number.
When the device address is configured as D0, Current Preset Value Number is stored in D1 and Next Preset Value Number
is stored in D2.
For the group 1 preset value, the value of the data registers (D4, D5) allocated to preset value number 1 is stored in D8052 and
D8053 as shown in the table above and it is compared to the current value.
Counting state
Current Preset
Value Number
(D1)
Next Preset
Value Number
(D2)
Before the count action, set the
Next Preset Value Number and
preset value 1 to 3 to the count
values with the initialize pulse.
Note: When the Next Preset Value Number preset value becomes active, the high-speed counter preset value during execution does not
change, even when the preset value for that preset value number is changed. When the current value and the current preset value match, the
preset value with the number stored in Next Preset Value Number becomes active. Changes to the Next Preset Value Number data register
must be performed before the preset value becomes active.
5-18
Count Count
Before action Action start
0 → 1
1 2
→
Preset value 1
is set to Current Preset
Value Number
S AXIS P
MART
Current value
and preset
value 1
matched
→ 2
3
→
Preset value 2
is set.
/L U ' M FT9Y-B1378
RO ITE SER S ANUAL
Current value
and preset
value 2
matched
→ 3 →
1
→ →
Preset value 3
is set.
Current value
and preset
value 3
matched
1
Repeat
2
Once again, preset
value 1 is set.