System States And Errors - JUMO mTRON T Operating Manual

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)
Start error
Start error
Start error
Bus status
Bus status
Bus status
Operation
(Priority 1)
Operation
(Priority 3)
Operation
(Priority 3)
Meaning
Module error (hardware does not
start up)
Internal error (bootloader)
Various errors during startup (e.g. no
memory, initialization error)
No firmware
No connection to central processing
unit
System in "Stop" (INIT) state – no
error, only in start phase
System in "Stop" (PREOP) state – no
error, only in start phase
Module not calibrated (LED flashes
red-green) or
module in calibration mode (cali-
brate/test; LED flickers red-green)
System in "Stop" (SAFEOP) state –
no error
System in "Run" (OP) state – no
error
5 Operation
Diagnos- Recommended action
tics with
LED Replace module
LED Replace module
LED Replace module
LED Check whether the central pro-
cessing unit is running; check
cabling and topology
LED
LED
LED/setup
program
LED
LED
31