Siemens SIMATIC ET 200SP Manual page 74

Interrupts/diagnostic messages
6.1 State and error displays
LED DIAG
LED PWR
72
Off Backplane bus supply of the ET 200SP not OK. Check or switch on the supply voltage
flashes Technology module not ready to operate (not
parameterized)
On Technology module parameterized and no
module diagnostics (no error exists)
flashes • Technology module parameterized and
module diagnostics (at least one error ex-
ists)
Firmware update is being performed
•
Off Supply voltage L+ missing
On Supply voltage L+ available
of the head station. Ensure that the
SIMATIC ET 200SP TM ECC PL ST
technology module is correctly plugged
into the BaseUnit.
Check the configuration and parame-
terization in your engineering tool (for
example TIA Portal) or evaluate the
diagnostic interrupts and troubleshoot.
BU type B1:
•
Check the external 24 V DC supply
voltage between L+ and M.
BU type B0:
•
Check the 24 V DC supply voltage
of the supplying potential group.
Technology module TM ECC PL ST (6FE1242-6TM20-0BB1)
Manual, 07/2019, A5E43919893B-AA