Siemens SIPROTEC 7SS523 V3.2 Manual page 88

Configuration
Other ports
Idle state of fibre
optic connection
72
Figure 4-23 DIGSI, setting options of the service port − Example
Within an IEC bus, a unique IEC address must be assigned to each SIPROTEC 4 de-
vice. A total of 254 IEC addresses are available for each IEC bus. Enter the IEC link
address of this device into the Address box.
The maximum message gap must only be entered if the device is to communicate via
one of the ports by means of a modem. The specified time is the admissible maximum
duration of transmission gaps during message transfer. Transmission gaps occur dur-
ing modem operation and are caused by data compression, fault correction and differ-
ing baudrate. If the transmission quality between the modems is good, we recommend
the setting 1.0 s. If modem connections are poor you should increase this value.
High values slow down communication in case of transmission errors. If a PC is con-
nected directly, the Max. message gap can be set to 0.0 s.
Note
Do not use the PC port for the communication via modem!
For the communication via modem use the service port.
In the other tabs you can enter your specific settings and addresses for device identi-
fication or check the values set by default. The device address is used by the control
center to unambiguously identify each device. It must be unique for each device as
otherwise it cannot be assigned in the overall system. For further information on the
port setting, please read the SIPROTEC System Description, /1/.
The idle state of fibre optic connection is set to "Light OFF" by default. You can change
the setting for the idle state in the tab of the interface settings (see Figure 4-24, page
73).
7SS52 V4 Manual
C53000-G1176-C182-1