Chapter 10 DC Input Option Board
10 - 8
(5) Count latch
(a) When Count latch signal is On, present count value is latched
(b) Setting
If present counter value is to latch, Count Latch function is set „Use‟.
When mounted at slot
no.9
When mounted at slot
no.10
(c) Count latch function is operated when „Count latch‟ signal is On. Namely, counter value is not cleared
when power supply Off =>On and mode change, it is counted from previous value.
(d) In latch counter function, internal preset function has to be used for clearing present value.
(6) Preset function
It changes the current value into preset value.
• Preset setting value is saved at the following U area.
Area per each channel (Double word)
Slot no. 9 internal
preset value
Slot no. 10 internal
preset value
• Preset command is specified through the following U area
Area per each channel (bit)
To Next Page
Loading...