WIKA PU-548, Operating Instructions Manual

Page: 15 / 68

EN
WIKA operating instructions programming unit PU-548 15
14232051.01 12/2017 EN/DE/FR/ES
9. The COM port is chosen automatically when starting the software.
→ Only if the right port is chosen, are the connection to the instrument
and starting of the program possible.
8. LED diagnostics
The model PU-548 programming unit is fitted with an LED for clear status
display. Through different light and flashing behaviour, detailed status
diagnostics are enabled.
LED behaviour Status
Off On Flashing
x Current loop not active
x Current loop active
x (fast) Data transfer
x (slowly) Connection to the PC and instrument is
ready for operation
From PC
to the
temperature transmitter
LED
7. Virtual COM ports / 8. LED diagnostics