Leds - Siemens SIMATIC NET S7-400 Manual

LEDs

LED display
The display on the front panel consists of the following LEDs that indicate the operating
mode and communications status.
Figure 4-1
The LEDs have the following meaning:
● INTF: Internal error
● EXTF: External error
● BUS1F: Bus fault on Ethernet interface
● BUS2F: Bus fault RNA interface
● TXD: Frame traffic (sending) over Ethernet
● RXD: Frame traffic (receiving) over Ethernet
● MAINT: Maintenance necessary (diagnostics buffer)
● RUN: RUN mode
● STOP: STOP mode
● X1 P1: Link status / activity of the Ethernet port of the Ethernet interface
● X2P1, X2P2: Link status / activity of Ethernet port 1, 2 of the RNA interface
CP 443-1 RNA
Manual, 03/2019, C79000-G8976-C299-04
LEDs front panel CP 443-1 Advanced
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