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Communication with the PLC
6.3.4
Program switching
All 255 measuring programs can be selected via the PLC inputs IN1 to IN9.
Attention: The inputs IN2 to IN9 are used also for functions other then the selection of the
measuring programs. This means that the timing has to be followed exactly.
OUT0
OUT1, 2, 3, 4
Check whether the output OUT0 "Enable" has been switched to HIGH (ready for operation), otherwise a
1
fault condition is existing.
Before selecting a measuring program all inputs must be switched to LOW for 10 ms.
2
Switch the input IN1 "program selection" to HIGH.
3
Simultaneously with
4
Max. 10ms after having switched IN1 "Program selection" the outputs OUT1...OUT4 are switched to
5
LOW.
After the binary value has been present for a minimum of 10 ms, switch the input IN1 "Program
6
selection" to LOW.
Simultaneously with
7
After a maximum time of 250ms the outputs OUT1...OUT3 are switched to HIGH.
8
If the configuration "Measurement: Demo mode" has been selected, measurement will re-start
automatically (if a valid program has been selected). If the configuration "Measurement external" has
been selected, the operation of the unit is then performed via the PLC.
Note:
Program-No.
1
2
3
...
254
255
Not used
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
60
Double Sheet Detector-series I20
Enable
Program switching
IN1
IN2-9
Bit 0-7
Meas. Start
IN0
0-1-2-sheet; Warning
1
or delayed switch the binary value to IN2...IN9.
3
or delayed switch back the binary values at IN2...IN9 (switch to LOW).
6
Bit 7
Bit 6
Bit 5
0
0
0
0
0
0
0
0
0
...
...
...
1
1
1
1
1
1
1
1
1
Manual
max. 10ms
min. 10ms
>=0ms
min. 10ms
3
4
total switching time > 80-320 ms
2
* depending on nominal thickness and material
Bit 4
Bit 3
Bit 2
Bit 1
0
0
0
0
0
0
0
0
0
0
0
1
...
...
...
...
1
1
1
0
1
1
1
1
1
1
1
1
B0069991 / Rev. 1.7
5
>=0ms
10-250ms*
6
7
8
Bit 0
0
1
0
...
1
0
1
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