379
2020/09
Range defined via the control interface/process output
(LOAD_UPLIMIT/LOAD_LOLIMIT)
Lower limit n
u
is 0…24 999 999 × 10
-3
Hz
Upper limit n
u
is 1…25 000 000 × 10
-3
Hz
The upper limit must be greater than the lower limit. An error is indicated by the ERR_LOAD status
bit via the check-back interface/process input. The status bit is cleared when a valid value is entered.
Possible measuring ranges with 60 pulses per sensor revolution
Possible measuring ranges with 60000 pulses per sensor revolution
Period duration measurement
Definition
In this operating mode the counter module measures the precise time between two rising edges of
the counter signal in ms by counting the pulses of an exact internal quartz crystal reference fre-
quency (1 MHz). An averaging operation can be carried out over 1 to 1000 periods. It is defined by
the integration time parameter or by the LOAD_INTTIME status bit in the control interface/process
output.
The displayed measured value cannot be updated until the set number of periods have elapsed.
The measured value is displayed in units of ms in the check-back interface/process input.
Integration time n
min
n
max
10 s 1 rpm 000 rpm
1 s 1 rpm 000 rpm
0.1 s 10 rpm 000 rpm
0.01 s 100 rpm 000 rpm
Integration time n
min
n
max
10 s 1 rpm 200 rpm
1 s 1 rpm 200 rpm
0.1 s 1 rpm 200 rpm
0.01 s 1 rpm 200 rpm
Fig. 265: Period duration measurement with release function; number of periods = 2
Reference
frequency
Count
signal
Period
Start of
id id
Internal
release
Update of
value indicated
To Next Page
Loading...
