Eaton ELC-PB, Programming Manual

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E L C P r o g r a m m i n g M a n u a l
F o r m o r e i n f o r m a t i o n v i s i t : w w w. e a t o n . c o m M N 0 5 0 0 3 0 0 3 E
3 - 3 3 6
Program Example 2:
1. Timing diagram and program control:
Y0
Y1
D0=k40
D0=k10
4sec
2sec
1 2
3
4
M0
T0
5sec
D0= k-1
M0
K50
CVM D0 K50 Y0
D0
T0 TMR
MOV k-1
T0
2. Control phases:
1) Phase
1
: When M0 = On, because the valve position is not known, set D0 = K-1 to
deliberately close the valve (Y0 = Off, Y1 = On) for 5 seconds and make sure the valve is
at the position of 0 seconds before moving on to the next step.
2) Phase
2
: When T0 = On, allow D0 = K40 to begin execution. Open the valve (Y0 = On,
Y1 = Off) for 4 seconds, moving the valve to the position of 4 seconds.
3) Phase
3
: Change the position of the valve and make D0 = K10. Because the previous
position was at 4 seconds, the valve shall be closed (Y0 = Off, Y1 = On) for 3 seconds,
moving the valve to the position of 1 second.
4) Phase
4
: Switch off M0 and the valve will no longer move (Y0 = Off, Y1 = Off).