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B0059001 / Rev. 2.3
5.3
Monitoring the Inputs / Outputs of the Control
On triggering the unit via the PLC-IO-interface, the correct function can be checked by the reaction
of the unit.
1)
After the measurement has been initiated with the signal "IN0 Measuring Start", the output
signal "OUT 7 Motor" must switch to HIGH within 100 ms. If not, a fault condition exists.
2)
After the max. measurement time (depending on tube diameter, rotation rate and program
parameter "Transient Time") the SND40 must have switched the output "OUT7 Motor" to
LOW. If not, a fault condition exists.
Sequence plan for measuring:
1.
Prepare the tube for measuring
2.
Check if signal "OUT2 Ready for measuring" is HIGH
If YES, continue. If NO, the unit is not ready for measuring (e.g. during Teach-In)
3.
Switch the signal "IN0 Measuring Start" to HIGH and start the tube turn
4.
Check if signal "OUT7 Motor" is HIGH within 100ms
If YES, continue. If NO, error condition exists
5.
When signal "OUT7 Motor" is LOW, stop the tube turn instantly.
At the same time, monitor whether the signal "OUT7 Motor" is not LOW after time xx
otherwise a fault condition exists
6.
Evaluate the signal "OUT6 reduced detection capability" or "OUT5 Error"
7.
Switch the signal "IN0 Measurement Start" to LOW
8.
Remove the tube.
The time xx depends on the tube diameter, the tube rotation rate and the set transient
time.
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
Weld Seam Detection System R4000 SND40
for Tubes, Cans and Drums
Manual
Communication with the PLC
61
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