btsr IS3W/MTC, Operating Manual

Page: 19 / 89

Operation
SMART 200 MTC -3.5 -
Interface Specifications
The IS3W.. sensors communicate with the external environment using the
following signals:
1 Output signal (STOP) .
2 Optical signaling (green and red LEDs)
1 Touch Light used by the operator to perform the sensor numbering and to
manually reset the counter.
STOP signal
The STOP signal is an OPEN COLLECTOR output through which the IS3W..
sensor signals three possible conditions:
- Normal operation ( regular strokes of yarn inside the sensor detection
zone ).
- Missing yarn stroke inside the sensor detection zone ( broken / missing
yarn failure )
- Target reached
From the electrical point of view, the STOP output can be configured either as a
Normally Open (
ST-NcO ) contact or as a Normally Closed ( ST-NCo ) contact, while
for what concerns the timing, it can be configured either as a continuous signal
(
ST-Cp ) or as a 2 seconds/10 seconds pulse signal ( ST-cP ) to indicate a failure
condition, and as a continuous signal ( STG-CT ) or as a 4 Hz square signal ( STG-
SQ ), to indicate the Target reached condition.
Starting from the Software Version 4.0, the STOP signal may be used to
fulfill a further function:
- Possibility to temporarily interrupt the meter count, by forcing the STOP
signal to Ground (STE-On)
(the count will restart as soon as the STOP signal returns to high electrical
level).
Obviously this function can be used only if the STOP signal has been
programmed as Normally Open (ST-NcO) contact.
Otherwise (ST-NCo), the function will have no effect.