Installation guide

78
Characteristics
Advantys
™
STB Distributed I/O
Solution 0
Counter module STB EHC 3020
Functional characteristics
Configurable functions Number 1 of the 6 configurable functions (using the Advantys configuration software)
Frequency meter
This basic function measures the frequency received on the IN A input.
This frequency is always expressed in Hz (number of pulses per second), with a precision
of 1 Hz.
Also measures the speed in units per second. The number of points to be received
on the IN A input, corresponding to one unit, must be defined from one up to 255.
The maximum frequency on the IN A input is 40 kHz in both cases (without filtering).
Response time: < 0.2 s (frequency 2/40 kHz), < 1 s (frequency 0.2 kHz).
Count events
This function provides the value of the number of pulses received on the IN A input during
a selectable time unit. The time unit is configurable: 0.1s, 1s, 10 s or 1 minute.
The IN B input can be used to reset the internal time basis which provides the time unit.
The maximum number of pulses counted during a time unit is up to 65,535.
The minimum pulse duration on the IN A input is 10 µs (without filtering).
Response time: < 0.5 ms.
Measure time periods
Measures the elapsed time during an event or between two events (on IN A input) according
to the selectable time base of 10 µs, 100 µs or 1 ms. The maximum event duration is 0.655,
6.55, or 65.5 seconds, respectively. The maximum frequency on the IN A input is 200 Hz.
Response time: < 0.5 ms.
Down counting
The IN B input starts or restarts the counter by resetting the setpoint value defined by the
high threshold value.
When the counter is running, any pulse received on the IN A input decreases the counter.
The counter stops when it reaches 0.
The maximum setpoint value is 65,535.
The maximum frequency on the IN A input is 40 kHz (without filtering).
Response time: < 0.5 ms.
Loop (modulo) counting
The IN B input starts or restarts the counter by resetting the setpoint value to 0. The IN B input
also triggers the capture of the previous counting value before the counter is reset to 0.
When the counter is running, any pulse received on the IN A input increases the counter.
The counter turns back to zero automatically when the pulse number received equals the
modulo defined by the high threshold value.
The maximum modulo value is 65,535.
The maximum frequency on the IN A input is 40 kHz (without filtering).
Response time: < 0.5 ms.
Up/down counting
The RST input starts or restarts the counter by resetting the preset value.
When the counter is running, counting increases or decreases according to the pulses received
on the IN A and IN B inputs (default settings: IN A increases the counter and IN B decreases
the counter).
By configuration:
v the IN B input can define the counting direction of the pulses received on IN A.
v the IN A and IN B inputs can receive the signals of an incremental encoder.
The counter value is limited to 0 as low limit and to 65,535 as high limit.
Response time: < 5 ms.
OUT 1 and OUT 2 output functions
According to requirements, each of the counting module’s two outputs can be configured for
one of the following operating modes:
v No direct action.
v The output is activated when the counter value is less than the low threshold.
v The output is activated when the counter value is between the low threshold and the high
threshold.
v The output is activated when the counter value is greater than the high threshold.
v A pulse is generated on the output when the low threshold is exceeded (when
counting down).
v A pulse is generated on the output when the low threshold is exceeded (when counting up).
v A pulse is generated on the output when the high threshold is exceeded (when
counting down).
v A pulse is generated on the output when the high threshold is exceeded (when counting up)
v The output is activated when the counter is in RUN mode. This option is only available when
counting down
v The output is activated when the counter is in STOP mode.
v The output is activated when the capture value is less than the low threshold. This option
is only available for the modulo function.
v The output is activated when the capture value is between the low threshold and the
high threshold. This option is only available for the modulo function.
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