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46 |
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47 |
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56 PDA system scheme for converter, RH furnace, LF furnace in
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64 S7-1200 as
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15
Profibus-DP
There are two alone DP interface in the PDA DP bridge of "PDA DPM-2B244-0AB0", they may be connected to two DP segments, 244 bytes of per DP segment are send to the PDA server by ethernet, pda244.gsd is its configuration file, multiple DP bridge can be linked in series when the sampling points is too much. PDA sample period may be 0.5ms. For S7-400/S7-300 acquisition procedures should be in the OB1, the effective sampling period is same as OB1 scan cycle.
The figure below is a typical DP network diagram, data source type is 25S, and Swap exchanges the high-order bytes. Each bridge's IP and DP station address are set by "pdaTools.exe", see section 5.5. 15.1
PDA_DPM network diagram
15.2 PDA_DPM hardware configurationThe figure below is the hardware configuration of "PDA DPM-2B244-0AB0" in S7-300.
15.3 PDA_DPM
program
Put collected data in a DB block such as DB100, call the "BLKMOV" to copy related data into the corresponding Q address at the end of OB1.
15.4 PDA_DPM
config
Below is a config for 116 analog and 96 digital. [1000,212CH,2.000ms,192.168.0.210,25S,Profibus-DP,192.168.0.216] No,
Name,Adr/note,Unit,Len,Offset
,Gain
,Type,ALM, CH1=, ,
, ,2 ,0.000000,1.000000,INT ,0 ,0.000,0.000,0.000,0.000,0 , CH2=, ,
, ,2 ,0.000000,1.000000,INT ,0 ,0.000,0.000,0.000,0.000,0 , CH3=, ,
, ,2 ,0.000000,1.000000,INT ,0 ,0.000,0.000,0.000,0.000,0 , …… CH211=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 , CH212=, ,
, ,1 ,0.000000,1.000000,BIT ,0 ,0.000,0.000,0.000,0.000,0 , 15.5 Driver pda244.gsdThe config of DP network bridge PDA DPM-2B244-0AB0 is below. ;=============================================== ; GSD-File for PDA DPM-2B244-0AB0 KingLM AG ; Model : PDA_DPM ; MLFB : PDA DPM-2B244-0AB0 ; ; Date : 15.07.2007 V ; ; File :
"pda244.gsd" ;=============================================== #Profibus_DP GSD_Revision=1 Vendor_Name="KingLM AG" Model_Name="PDA_DPM 244 Byte Out" Revision="V1.0" Ident_Number=0x6666 Protocol_Ident=0 Station_Type=0 Hardware_Release="V1.0" Software_Release="V1.0" ;------------------- baudrate ------------------ 9.6_supp
= 1 19.2_supp = 1 45.45_supp
= 1 93.75_supp
= 1 187.5_supp
= 1 500_supp
= 1 ; MaxTsdr_9.6
= 60 MaxTsdr_19.2 = 60 MaxTsdr_45.45 =
60 MaxTsdr_93.75 =
60 MaxTsdr_187.5 =
60 MaxTsdr_500
= 100 MaxTsdr_ MaxTsdr_ MaxTsdr_ MaxTsdr_ Implementation_Type="dp_slave" ; Slave-Specification: OrderNumber="PDA DPM-2B244-0AB0" Freeze_Mode_supp
= 0 Sync_Mode_supp = 0 Auto_Baud_supp = 1 Set_Slave_Add_supp = 0 Fail_safe
= 0 Min_Slave_Intervall = 6 Slave_Family
= 0 Max_Diag_Data_Len
= 6 Modul_Offset
= 0 Modular_Station = 0 …… 15.6 TDC244bytes can be collected by TDC Profibus-DP every 2ms, FM458 is same. DP module CP
Initial function block must be put into 32~255ms cycle.
The period must be same between DWR and CTV_P, it may be T1, otherwise the communication status is normal but no proper data is collected. PLC can normally work if DP cable is broke.
CFC program is below for the second DP network data acquisition.
DP cable type and route should be noticed for higher speed. 15.7
Profibus-DP master station gateway
PDA gateway is as DP master station, It sends the collected signal to the PDA server by RT Ethernet, The type of data source is 36. 15.8
Profibus-DP multi-slave station gateway
Each PDA gateway can be used as 4 slave stations of one DP segment, 4*244=976 bytes may be collected, The other is similar to the last section. 15.9
Profibus-DP multi-slave station PCI card
Insert a multi slave DP card to the PDA server, the DP master station sends the collecting data to the card, such as Woodhead SST-PBMS-PCI supports 125 slave.
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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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