Manual
Double Sheet Detector-series I20
B0069991 / Rev. 1.7
Communication with the PLC
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
55
6 Communication with the PLC
The I20 has 10 galvanically isolated (opto coupled) inputs and 5 galvanically isolated (opto
coupled) outputs.
6.1
PLC inputs
If different functions are performed at the same time, an fault message will be generated.
The following functions are possible:
1. Measurement Start / Stop
2. System test (gap control sensors)
3. Program switching
4. Clear 2-sheet / Clear 0-1-2-wa outputs
5. Zero adjust (not active by default)
6. Material detection NF (with first selected sensor)
7. Teach-In 1-sheet (not active by default)
8. Teach-In 2-sheet (not active by default)
9. Reset
Fault
6.2
PLC output signals
The following signals are available as outputs:
Opto coupler outputs
Signal Meaning
Note
OUT3
0-sheet output
Standard 0 V active (selectable in system configuration)
OUT2
1-sheet output
Standard 0 V active (selectable in system configuration)
OUT1
2-sheet output
Standard 0 V active (selectable in system configuration)
OUT0
ENABLE output
Standard 24 V active (not selectable, for safety reasons)
OUT4
Warning
Standard 0 V active (selectable in system configuration)
Attention
If the external outputs or inputs are used, then the supply voltage for
the outputs / inputs needs to be connected.
6.2.1
Signal „Enable“
The signal ENABLE is always 24V active
The signal is LOW (0V)
• during system operation via keyboard
• in case of system fault
• during a system test
The signal is HIGH (24V)
• when the system is operational
