Jumo 705030 mTRON T - Digital Input/Output Module Opera Uživatelský manuál Strana 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
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 3)
System in "Stop" (SAFEOP) state –
no error
LED
Operation
(Priority 3)
System in "Run" (OP) state – no
error
LED
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