Siemens SIMATIC S7-1500 Manual page 40

Diagnostics
7.1 Status and error displays
LED displays RUN/ERROR/MAINT
Table 7-1 Meaning of the LEDs RUN/ERROR/MAINT
LEDs
RUN ERROR MAINT
Off Off
Off
Flashes
On Off
On
Flashes
Flashes Flashes Flashes
PWR LED display
Table 7-2 Meaning of the PWR LED display
LED PWR
Off
On
LINK LED display
Table 7-3 Meaning of the LINK LED display
LINK LED
No Ethernet link detected.
Off
This file must be in Linux or Windows format in order to be read by the TM NPU. Editors outside a Linux environment can
1
change the line endings and thus make the file unreadable for the TM NPU.
40
Meaning
No or too low supply voltage via backplane
Off
bus.
The technology module starts and waits until
Off
the valid parameter assignment is set.
Parameter assignment of the technology
Off
module is valid.
Module error, e.g. no supply voltage
Off
Firmware update running.
Communication between AI processor and
backplane bus is faulty.
Hardware or firmware defective.
Meaning
External supply voltage too low or missing.
External supply voltage available.
Meaning
Remedy
• Switch on the CPU or IM and/or the sys­
tem power supply.
• Check that the U connectors are inserted.
• Check whether too many modules are
inserted.
---
---
Check the supply voltage.
---
• Make sure that the SIMATIC Memory Card
contains all the files required for the
application. In case of doubt, replace
them with a new copy.
• Switch the supply voltage off and on
again.
Replace the technology module.
Remedy
Check the external supply voltage.
---
Remedy
Check whether:
• The Ethernet configuration is activated
• The configuration file "network.conf" was
saved correctly 1
For the correct coding of the configuration file,
refer to section network.conf (Page 56).
• An Ethernet cable is inserted
Equipment Manual, 07/2023, A5E46384784-AC
Technology Module TM NPU