Profibus Dp Communication; Diagnosis Using Leds - Siemens SIMATIC MOBY D System Manual

9.4.5

PROFIBUS DP communication

9.4.5.1 Diagnosis using LEDs

Display elements on the ASM
Table 9- 8
Light emitting diode
SF
5 V DC
ACT_1, ACT_2
ERR_1, ERR_2
PRE_1, PRE_2
RxD_1, RxD_2
On the ASM 475, further operating states are indicated with the LEDs PRE, ERR and SF:
Table 9- 9
SF
ON
ON
OFF
OFF
Any
OFF
MOBY D
System Manual, 01/2010, J31069-D0147-A6-7618
Function of the LEDs on the ASM 475
Meaning
System fault (hardware error on ASM)
24 V are connected to the ASM and the 5 V voltage on the ASM is OK.
The corresponding write/read device is active in processing a user command.
A flashing pattern indicates the last error to occur. This display can be reset
using the parameter Option 1.
Indicates the presence of an MDS.
Indicates continuous communication to the SLG. Faults on the SLG can also
cause this indicator to be lit.
Operating status display on ASM 475 via LEDs
PRE_1 ERR_1 PRE_2
OFF/ON ON OFF/ON ON
(perm.)
OFF ON OFF
2 Hz OFF 2 Hz
2 Hz 2 Hz 2 Hz
5 Hz 5 Hz 5 Hz
OFF 1 flash OFF
every 2 s
ERR_2 Meaning
Hardware is defective (RAM, Flash, etc.)
(perm.)
OFF Charger is defective (can only be repaired in
the factory).
OFF Firmware loading is active or no firmware
detected
Firmware download

ASM must not be switched off

2 Hz Firmware loading
terminated with errors
Restart required

Load firmware again

Check update files

5 Hz Operating system error
Switch ASM off/on

1 flash ASM has booted and is waiting for a RESET
every 2 s (init_run) from the user.
System integration
9.4 ASM 475
257