VIPA SLIO FM 050-1BB30, Manual, Page: 38 / 40

Chapter 3 Deployment
Manual VIPA System SLIO
3-6 HB300E - FM - RE_050-1BB30 - Rev. 10/30
Counter functions
The counters of the 050-1BB30 are continuous counter, whose direction
may be preset by the parameterization. The counters serve e.g. for
distance measuring with incremental encoder.
The activation res. de-activation of the counter happens via an internal gate
(I gate). The I gate corresponds to the software gate (SW gate).
The
SW gate
is opened (activated) via your user application by an edge 0-1
of the bit SW_GATE_SET of the
control word
in the
output area
. The
software gate is closed (de-activated) by an edge 0-1 of the bit
SW_GATE_RESET. With an edge 0-1 at
SW gate
the counter is reset to 0.
The following states influence the I gate:
SW gate influences I gate
0 0
1
1
with edge 0-1 1
Each counter always starts at 0. When the counter counts forward and
reaches the upper count limit and another counting pulse in positive
direction arrives, it jumps to the lower count limit and counts from there on.
When the counter counts backwards and reaches the lower count limit and
another counting pulse in negative direction arrives, it jumps to the upper
count limit and counts from there on.
The count limits are set to the maximum count range.
Limits Valid value range
Lower count limit -2 147 483 648 (-2
31
)
Upper count limit +2 147 483 647 (2
31
-1)
With overflow or underflow the status bits STS_OFLW respectively
STS_UFLW are set. These bits remain set until these are reset with
RES_SET in the
control word
.
end value
lower
counter limit
0
gate start gate stop
overflow
underflow
time
counter value
gate start gate stop
Overview
Count
continuously