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<P>Im looking for some help on "modern" PLC programming techniques for an AB slc500 using RSLogix 500 to carry out 6 off valve sequencing(V1 to V8) & blower start&stop on a water filtration system.
<P>I can do it the "old fashioned way" using the limit switches as premissive/ interlocks to open valves and start timers, but I'm looking into using the modern facilities of the RSlogix 500 software.
<P>To give a rough idea of 1 of the filters it is as follows;
<PRE>
Vent <---V7--- ----V1-----< H2O In
| |
| |---V5----->Back Wash
|-----------| H2O out
| |
| |
| filter |
| |
| |
|___________|
| |
>X---V6-----> |-------V2----->H2O Out
Blower Air In |
|_______V8____>Drain
The sequence is as follows;
Blower V1 V2 V5 V4 V6 V7 V8
Online 0 1 1 0 0 0 0 0
Offline 0 0 0 0 0 0 1 1
Drain 0 0 0 1 1 1 1 0 for 2m Air Scour 1 0 0 0 0 1 1 0 for 5m
BW Air/H2O 1 0 0 1 1 1 1 0 for 10m
BW H2O 0 0 0 1 1 0 0 0 for 10m
Refill 0 1 0 0 0 0 1 0 for 1m
Rinse 0 1 0 0 0 0 0 1 for 5m
Where 1 = open/ on & 0 = closed/ off
</PRE>
<P>Any input greatly appreciated. Thanks in advance
<BR>Gray
<P>I can do it the "old fashioned way" using the limit switches as premissive/ interlocks to open valves and start timers, but I'm looking into using the modern facilities of the RSlogix 500 software.
<P>To give a rough idea of 1 of the filters it is as follows;
<PRE>
Vent <---V7--- ----V1-----< H2O In
| |
| |---V5----->Back Wash
|-----------| H2O out
| |
| |
| filter |
| |
| |
|___________|
| |
>X---V6-----> |-------V2----->H2O Out
Blower Air In |
|_______V8____>Drain
The sequence is as follows;
Blower V1 V2 V5 V4 V6 V7 V8
Online 0 1 1 0 0 0 0 0
Offline 0 0 0 0 0 0 1 1
Drain 0 0 0 1 1 1 1 0 for 2m Air Scour 1 0 0 0 0 1 1 0 for 5m
BW Air/H2O 1 0 0 1 1 1 1 0 for 10m
BW H2O 0 0 0 1 1 0 0 0 for 10m
Refill 0 1 0 0 0 0 1 0 for 1m
Rinse 0 1 0 0 0 0 0 1 for 5m
Where 1 = open/ on & 0 = closed/ off
</PRE>
<P>Any input greatly appreciated. Thanks in advance
<BR>Gray