3.2.3 7-segment display
Figure 3-7 7-segment display
Displaying messages
● It serves to output status information during commissioning, ramp-up and cyclical operation.
The 7-segment display is visible on the rear side of the PPU.
● During normal operation, "6" appears here and the dot flashes.
Load BIOS
7-segment display Meaning
00 Before loading the Master Boot Record (MBR) from the SD card
01 Before starting the Master Boot Record (MBR) codes
02 Master Boot Record (MBR) code has started
03 Second stage of the boot loader has started, before reading the configuration
file
04 Before loading the kernel
05 Before starting the kernel
Booting the basic system
7-segment display Meaning
1 (begin) Basis initializations
2 (prepfs) Cleaning up and preparing the file system
3 (hostname, loopback) The name is set and the loopback interface configured.
4 (syslog) Starting the system logging
Starting the CFS class 1, provide the network interfaces.
5 (network) Initializing the network interfaces and the firewall
6 (PPU:rtai, TCU:tcu‐
config))
Starting the time server (ntpd)
7 (lsh) Starting the SSH server (generate a host key if one is still not available).
8 (PPU:ftpd,
TCU:mtouch)
Starting the FTP server
9 (PPU:tcuservices,
TCU:usbexport)
Starting the TCU services (TFTP, VNC)
System characteristics
3.2 Operator controls and display elements
PPU 1740
Equipment Manual, 01/2019, A5E47615272B AA 31
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