JUMO 705001 mTRON T - Central Processing Unit Operating Manual - Manual (Page 40)

5 Operation
40
5.4.2 System states and errors
The following table lists all the system states and errors that are indicated by the "Status" and
"BusError" LEDs. In most cases, further diagnostics must be performed with the setup pro-
gram.
Category "Status"
LED
"BusError"
LED
Meaning Diagnos-
tics with Recommended action
Start error Internal error (1st boot-
loader)
Internal error (2nd boot-
loader)
No firmware (2nd boot-
loader)
LED Replace central pro-
cessing unit.
Start error/
operation Internal error Setup pro-
gram Perform restart, read
out error.
After several restart
attempts with an internal
error:
replace central process-
ing unit.
Start error Buffer battery dead (sys-
tem start only possible with
"cold" reset) LED Replace buffer battery.
Start error Various errors when start-
ing the system bus (e.g. no
memory, initialization error,
error when reading the bus
configuration)
Bus configuration not avail-
able.
If the "Com1" and "Com2"
LEDs also light up red, the
input voltage is too low
(< 19 V).
Setup pro-
gram or
Web
browser
Re-transfer configura-
tion with the setup pro-
gram.
Start error Error in topology
Bus configuration does not
correspond to the actual
state.
Target state of hardware
configurator does not cor-
respond to the actual state.
Setup pro-
gram or
Web
browser
Check that all (manda-
tory) modules are pres-
ent and correctly
connected; check LED
display of modules; if
necessary, re-transfer
configuration with the
setup program.