Table 8-1 LED displays
LEDs Meaning Remedy
SF BF /
BF1
ACT ON
Off Off Off Off No voltage is applied to the IM 650 or hard‐
ware defect of the IM 650.
Switch on the power supply module or re‐
place the IM 650.
Irrele‐
vant
Irrele‐
vant
Irrele‐
vant
On Voltage is applied to the IM 650. IM 650 is
in operation.
—
On Off Off Off IM 650 is undergoing a hardware reset af‐
ter switch-on
—
On On On On Hardware test after switch-on —
On On Off Off The operating system update is running —
Off Flash‐
ing
0.5 Hz
Off Off The operating system update has conclu‐
ded successfully
On Flash‐
ing
0.5 Hz
Off Off External error, e.g. incompatible operating
system
Use a suitable operating system for the up‐
date.
On Flash‐
ing
2 Hz
Off Off Internal error, e.g. when writing the update
files
Repeat the update process.
If the LEDs repeat the error pattern, the in‐
ternal memory is defective.
Irrele‐
vant
Flash‐
ing
Off On IM 650 parameters are assigned incorrect‐
ly, no data exchange is taking place be‐
tween the DP master and the IM 650.
Causes:
● PROFIBUS address is incorrect
● Faults on the bus.
● Check the IM 650.
● Check the configuration and parameter
assignment.
● Check the PROFIBUS address on the
IM 650 and in the PCS 7 project (HW
Config).
● Check the cable length with reference
to the baud rate.
● Check the setting of the terminating
resistors.
Irrele‐
vant
On Off On No connection to the DP master (baud rate
search)
Causes:
● the bus communication via
PROFIBUS DP to the IM 650 has been
interrupted
Check the bus configuration.
● Check to see if the bus connector is
inserted properly.
● Check whether the bus cable to the DP
master is interrupted.
● Switch the On/Off switch for the
24 V DC on the power supply module
off and back on.
On Flash‐
ing
Off On The preset configuration of the ET 200PA
SMART does not match the actual config‐
uration of the ET 200PA SMART.
Check the configuration of the ET 200PA
SMART to see if a module is missing or
defective or if a non-configured module is
present.
Check the configuration.
Interrupt, error and system messages
8.2 Diagnostics of the IM 650 by LED displays
ET 200PA SMART
Operating Instructions, 06/2019, A5E34192013-AB 89