Replacing A Module Without A Programming Device - Siemens S7-1500 Operating Instructions Manual

Diagnostics and upkeep

5.3 Replacing a module without a programming device

5.3 Replacing a module without a programming device
General procedure
The configuration data of the CP is stored on the CPU. This makes it possible to replace this
module with a module of the same type (identical article number) without a PG.
Note
Configured MAC address is adopted
When setting the ISO protocol, remember that MAC address set previously during
configuration is transferred by the CPU to the new CP module.
Module replacement: Special feature of IP address assignment from a DHCP server (IPv4)
During configuration of the CP you can specify the IP configuration in the properties dialog;
one option is to obtain the IP address from a DHCP server.
Note
Recommendation: Configuring a client ID
When replacing modules, remember that the factoryset MAC address of the new module is
different from the previous module. When the factoryset MAC address of the new module is
sent to the DHCP server, this will return either a different or no IP address.
Ideally, you should therefore configure IP as follows:
• Always configure a client ID and configure your DHCP server accordingly. This makes
sure that after replacing the module, you always obtain the same IP address from the
DHCP server.
If, in exceptional situations, you have configured a new MAC address instead of the MAC
address set in the factory, the configured MAC address will always be transferred to the
DHCP server. In this case, the new CP also has the same IP address as the previous
module.
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Operating Instructions, 05/2017, C79000-G8976-C289-07
CP 1543-1