Siemens 7SG11 Technical Manual page 45

2.5. Parity Setting
IEC 870-5-103 defines the method of transmission as using EVEN Parity. However, in some instances an
alternative may be required. This option allows the parity to be set to NONE.
2.6. Address Setting
The address of the relay must be set to a value between 1 and 254 inclusive before any
communication can take place. Setting the address to zero disables communications to the relay,
although if it is in an optical ring it will still obey the Data Echo setting. All relays in an optical ring must
have a unique address. Address 255 is reserved as a global broadcast address.
©2011 Siemens Protection Devices Limited
7SG11 Argus 8 Communication Interface
Chapter 4 Page 4 of 8