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LN30xx Siemens PLC Integration
Basic profibus profile for LN30xx
Instruction and Parameter Set
Profile word layout as seen on plc
PIW word 256-301 with PQW 256-263 PLC example map for slave address 10 LN30xx Fault Gauge
profile
Checking and setting the Fault Threshholds (Lump)
Reading the Lump Threshold value which is parameter 6
PQW256 16#1006 returns
PIW256 16#3006
PIW258 16#3951 = MSW
PIW260 16#B717 = LSW
Converted = 0.000199999m = 200 microns
To set the threshold to say 165 microns.
165micron = 0. 000165m. Converted to HEX = 392D03DA
Use command
PQW256 16#3006
PQW258 16#392D = MSW
PQW260 16#03DA = LSW
PLC confirms back with
PIW256 16#3006
PIW258 16#392D
PIW260 16#03DA
Checking the fault height, length and position
Lump height
PIW274 16#3B03 = MSW
PIW276 16#126F = LSW
0.0020m = 2.0mm
Lump length
PIW278 16#3D63 = MSW
PIW280 16#BABA = LSW
0.05559m = 55.6mm
Lump position
PIW282 16#43C4 = MSW
PIW284 16#F999 = LSW
393.9499m
Note that this was with a line running in simulated speed of 30m/min.
Verify Gauge is reading for communication
PIW262 16#2300
2 3 0 0
0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0
So bits 13, 9 and 8 active = FD, RN and PO bits all active
Serial Code definitions to be read in conjunction with Profibus profile
End of Document