Jumo 705020 mTRON T - Analog Input Module, 4-Ch. Operat Manuale Utente Pagina 31

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5 Operation
5.2.2 System states and errors
The following table lists all the system states and errors that are indicated by the "S" LED (Sta-
tus). In most cases, further diagnostics must be performed with the setup program.
Category "S" LED
(Status)
Meaning Diagnos-
tics with
Recommended action
Start error Module error (hardware does not
start up)
LED Replace module
Start error Internal error (bootloader)
Various errors during startup (e.g. no
memory, initialization error)
LED Replace module
Start error No firmware LED Replace module
Bus status No connection to central processing
unit
LED Check whether the central pro-
cessing unit is running; check
cabling and topology
Bus status System in "Stop" (INIT) state – no
error, only in start phase
LED
Bus status System in "Stop" (PREOP) state – no
error, only in start phase
LED
Operation
(Priority 1)
Calibration mode LED/setup
program
Operation
(Priority 2)
Collective alarm (incl. out of range) LED/setup
program
Operation
(Priority 3)
System in "Stop" (SAFEOP) state –
no error
LED
Operation
(Priority 3)
System in "Run" (OP) state – no
error
LED
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