Pilz PSSu H CAN - Manual (Page 26)

7.2 Display elements
7 Operation
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7-2
7.2 Display elements 7200 Display elements 7- Anzeige Legende 3x
Legend:
7.2.1 Display elements for system diagnostics
Display elements for system diagnostics 7- ][BA_Anzeige System
The module has LEDs to display various PSSu states (“Usb” LED and
“Dev” LED).
(*
1
) An error on the module bus (flashing red LED) may be due to one of
the following reasons, which are stored in the error stack:
1. The head module cannot determine the registered hardware. Possible
causes:
 Module bus is incomplete
 Terminating resistor is missing.
 A module is defective
 A module does not have valid software.
 Invalid hardware registry
 Too many modules
LED on
LED flashes
LED off
LED Key
Description Colour Status
Usb - - - No data is being
transmitted via
the USB port
Green Data is being
transmitted via
the USB port
Dev - - - PSSu system
error, no start-
up
Green PSSu running
without error
Red Error in the
head module
Red Error on the
module bus (*
1
)
Usb Dev
--- ---
Dev Usb