Airtec RE-46, User Manual

Page: 14 / 40

14
3.5 Controlling the valves by a PLC or IPC
In the table below you will find the assignment of bits and bytes of the output data
to the valves / solenoids:
Group 1 (output byte 1) 2 (output byte 2) 3 (output byte 3)
Station 1 2 3 4 5 6 7 8 9 10 11 12
Solenoid
No. (top)
1 3 5 7 9 11 13 15 17 19 21 23
Value bin. 2
0
2
2
2
4
2
6
2
0
2
2
2
4
2
6
2
0
2
2
2
4
2
6
Value
dec.
1 4 16 64 1 4 16 64 1 4 16 64
Solenoid
No. (bot-
tom)
2 4 6 8 10 12 14 16 18 20 22 24
Value bin. 2
1
2
3
2
5
2
7
2
1
2
3
2
5
2
7
2
1
2
3
2
5
2
7
Value
dec.
2 8 32 128 2 8 32 128 2 8 32 128
Table: Assignment of output bytes 1-3 to the valves / solenoids, shown at a 12
station valve terminal
Significance:
Each output byte controls 8 solenoids, where the least significant bit ( LSB ) is as-
signed to solenoid 1 , the most significant bit ( MSB ) is assigned to solenoid 8 .
The following rules apply:
1 = 24V on = solenoid active (active position of the valve)
0 = 24V off = solenoid inactive (idle position of the valve)
Example for 1 byte output data (all even solenoids on):
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1 0
1 0 1 0 1 0
MSB LSB
Sole-
noid
8
Sole-
noid
7
Sole-
noid
6
Sole-
noid
5
Sole-
noid
4
Sole-
noid
3
Sole-
noid
2
Sole-
noid
1
WARNING:
When using 5/2-way pulse valves or 5/3-way with center position, make sure that
only one of the two solenoids is activated at the same time, i.e. the „odd“ or the
„even“ solenoid. If both solenoids are activated simultaneously, the valve posi-
tion is undetermined!