Technical data

Table Of Contents
System Status Lists (SSL)
System Software for S7-300/400 System and Standard Functions - Volume 2/2
33-34
A5E00739858-01
Data Record
A data record of partial list with SSL-ID W#16#xy37 has the following structure:
Name Length Meaning
logaddr 2 bytes Logical base address of the interface
ip_addr 4 bytes IP address
The IP address is stored in the following format (example. a.b.c.d):
offset x: a, offset x+1: b, offset x+2: c, offset x+3: d
subnetmask 4 bytes Subnet mask
The subnet mask is stored in the following format (example. a.b.c.d):
offset x: a, offset x+1: b, offset x+2: c, offset x+3: d
defaultrouter 4 bytes IP address of the default router
If you have not configured a default router, the IP address of the interface is
entered here.
mac_addr 6 bytes MAC address
source 1 byte Origin of the IP address:
B#16#00: IP address not initialized
B#16#01: IP address was configured in STEP 7
B#16#02: IP address was set via DCP
B#16#03: IP address was obtained from a DHCP server
B#16#04 to B#16#FF: reserved
reserve 1 byte Reserved
dcp_mod_
timestamp
8 bytes Time stamp of the last change of the IP address via DCP
Note: The content of this field must only be evaluated if bit 1 is set in the
source.
phys_mode1 1 byte Status of port 1:
Bit 0: Duplex mode (only relevant, if AUI mode = 0):
1: phys. layer functions full duplex, 0: phys. layer functions half duplex
Bit 1: Baud rate identifier (only relevant, if AUI mode = 0):
1: phys. layer works with 100 MBd, 0: phys. layer works with 10 MBd
Bit 2: Link status:
1: phys. layer has link pulse, 0: phys. layer has no link pulse
Bit 3: Auto mode:
1: phys. layer should automatically adjust itself to the LAN medium
0: phys. phys. layer should not automatically adjust itself to the LAN
medium
Bit 4: 0
Bit 5: 0
Bit 6: 0
Bit 7: Validity:
0: phys_mode1 contains no valid data, 1: phys_mode1 contains valid
data
The numbering of the ports is identical with the numbering in the
configuration. If the interface has only one port, its physical properties are
entered for port 1.
phys_mode2 1 byte Status of port 2 (configured like phys_mode1)
phys_mode3 1 byte Status of port 3 (configured like phys_mode1)
phys_mode4 1 byte Status of port 4 (configured like phys_mode1)