Process Data Acquisition – PLC -- Detailed
analysis of quality manage&industrial big data sources |
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56 PDA
system scheme for converter, RH furnace, LF furnace in steel plant |
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17
CoDeSys
For real-time operating systems based on VxWorks, such as LogiCAD, TCS, ISaGRAF, etc. If the system is configured with a memory image network, it is recommended to prioritize using the memory image network method, as shown in the previous section. Ethernet can send data to PDA servers using standard Udp or Tcp methods. The sampling period can reach 1ms. Add communication library CAA Net Base Services. Using Udp protocol, the PLC side program is shown in the following figure. UDP_ Peer01.xActive should be true, UDP_ Peer01.hPeer should be greater than 0, otherwise the PLC will be "cold reset". UDP_ The rising edge of Send triggers data transmission, so 1 frame of data is sent every 2 cycles. The configuration of Config.csv on the PDA server side is as follows, where the data source type is 25. [1001,365CH,2.000ms,192.168.0.105,25,CoDeSys,192.168.0.216] No,
Name,Adr/note,Unit,Len,Offset
,Gain
,Type,ALM, CH1=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH2=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH3=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 …… CH364=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 CH365=, ,
, ,4 ,0.000000,1.000000,REAL,0 ,0.000,0.000,0.000,0.000,0 |
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Apparatus test&Fault diagnosis&Quality analysis |
Millisecond data sampling Real-time data compression Capture signal instantaneous mutation |
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PDAServer
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