turck BL20 Series - Page 361

359
2020/09
Upper count limit
‚Load value
ƒLower count limit
Single count
Definition
In this mode the counter module runs a single-action count after the release signal from the load
value to the upper or lower limit value, depending on the main count direction set.
1 No main count direction
If the counter counts up and reaches the upper count limit, it will jump to the lower count limit
when another counter signal is received. The internal release signal is automatically reset.
If the counter counts down and reaches the lower count limit, it will jump to the upper count limit
when another counter signal is received. The internal release signal is automatically reset.
2 Main count direction up
If the counter counts up and reaches the upper count limit, it will jump to the load value when
another counter signal is received. The internal release signal is automatically reset.
If the counter counts down and reaches the lower count limit, it will jump to the upper count limit
when another counter signal is received. The internal release signal is automatically reset.
Fig. 256: Continuous counting with status bit
a
b
c
0
t
t
t
t
STS_ZC
STS_OFLW
STS_UFLW
RES_STS
t
t
t
Internal release