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