X-CPU 01 4 Start-up
HI 801 009 E Rev. 4.00 Page 33 of 52
Module
Designation Description
Name Name of the communication module.
Use Max. µP Budget for
HH Protocol
Activated: Use CPU load limit from the field Max. µP Budget
for HH Protocol [%].
Deactivated: Do not use the CPU Load limit for safeethernet.
Max. µP Budget for HH
Protocol [%]
Maximum CPU load of module that can be used for processing
the safeethernet protocols.
i
The maximum load must be distributed among all the
implemented protocols that use this communication
module.
IP Address IP address of the Ethernet interface.
Subnet Mask
32 bit address mask to split up the IP address in network and
host address.
Standard interface
Activated: the interface is used as standard interface for the
system login.
Default setting: Deactivated
Default Gateway IP address of the default gateway.
ARP Aging Time [s]
A processor or COM module stores the MAC addresses of the
communication partners in a MAC/IP address assignment table
(ARP cache).
If in a period of 1x....2x ARP Aging Time ...
... messages of the communication are received, the MAC
address remains stored in the ARP cache.
... no messages of the communication partner are received,
the MAC address is erased from the ARP cache.
The typical value for the ARP Aging Time in a local network
ranges from 5...300 s.
The user cannot read the contents of the ARP cache.
Range of values: 1...3600 s
Default value: 60 s
Note:
If routers or gateways are used, the user must adjust (increase)
the ARP Aging Time due to the additional time required for two-
way transmission.
If the ARP Aging Time is too low, the MAC address of the
communication partner is erased from the ARP cache, the
communication is delayed or interrupted. For an efficient
performance, the ARP aging time value must be less than the
receive timeout set for the protocols in use.
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