Technical data
Chapter 9 SM 238C - Combination module Manual VIPA System 200V
9-28 HB97E - SM - Rev. 09/19
Main counting direction forward
• The counter counts starting with the load value.
• When the counter reaches the end value –1 in positive direction, it
jumps to the load value at the next positive count pulse and the gate is
automatically closed.
• To restart the count process, you must create a positive edge of the
gate. The counter starts with the load value.
Valid value range
End value - 2 147 483 646 (-2
31
+1) to + 2 147 483 646 (2
31
-1)
Lower count limit - 2 147 483 648 (-2
31
)
Counter value - 2 147 483 648 (-2
31
) to end value -1
Load value - 2 147 483 648 (-2
31
) to end value -2
end value
lower
counter limit
load value
0
overflow
underflow
time
counter value
gate stop
automatically
gate stop
automatically
gate start
gate start
Main counting direction backwards
• The counter counts starting with the load value.
• When the counter reaches the end value in negative direction, it jumps
to the load value at the next negative count pulse and the gate is
automatically closed.
• To restart the count process, you must create a positive edge of the
gate. The counter starts with the load value.
Valid value range
End value - 2 147 483 646 (-2
31
+1) to + 2 147 483 646 (2
31
-1)
Upper count limit +2 147 483 646 (2
31
-1)
Counter value - 2 147 483 646 (-2
31
+1) to + 2 147 483 646 (-2
31
-1)
Load value - 2 147 483 646 (-2
31
+1) to + 2 147 483 646 (-2
31
-1)
upper
counter limit
load value
0
gate start
time
counter value
gate stop
automatically
gate start
end value
gate stop
automatically