2.8 Inter relay communication
81
6MD665 Manual
C53000-G1876-C103-3
each participating SIPROTEC
®
4 device can fundamentally be defined as the
master, these settings are also made during configuration of the IRC combination.
Right-click the object of type IRC combination. Click Object properties in the context
menu. The dialog box Properties - IRC combination opens. Select the Transmis-
sion parameters tab.
Figure 2-33
Properties dialog box — IRC combination, Transmission parameters tab
Note
We recommend using the preset transmission parameters.
Specifying interface
settings
The following interface settings can be set:
• Transmission mode
Select the name of a transmission mode from this drop-down list box. At this time
you can choose between UART and HDLC. HDLC ensures an approx. 15 %
greater transmission density than UART using the same baud rate. The selected
transmission mode must be compatible with the communications modules installed
in the SIPROTEC
®
4 devices in the IRC combination.
• Baud rate
Select a baud rate from this drop-down list box. Which baud rates are available for
selection depends on the transmission mode you have selected. The higher the
transmission rate, the shorter the cycle time or the more users can be connected to
the bus with the same cycle time. The processor load of the master increases when
the cycle time is small and when many slaves are connected to the bus. In excep-
tional cases, the parameter Minimal cycle time must be increased for this reason.
When using the HDLC protocol, the baud rate is to be set according to the bus con-
figuration:
– Line bus via RS485: 1 MBit (limited by RS485 and cable length)
Содержание SIPROTEC 6MD665
Страница 8: ...Preface vi 6MD665 Manual C53000 G1876 C103 3 ...
Страница 14: ...Contents vi 6MD665 Manual C53000 G1876 C103 3 ...
Страница 140: ...3 Installation and Commissioning 126 6MD665 Manual C53000 G1876 C103 3 ...
Страница 166: ...4 Technical Data 152 6MD665 Manual C53000 G1876 C103 3 ...
Страница 201: ...A 9 Group Alarms 187 6MD665 Manual C53000 G1876 C103 3 A 9 Group Alarms No Description No Description ...
Страница 210: ...Literature 196 6MD665 Manual C53000 G1876 C103 3 ...
Страница 222: ...Index 208 6MD665 Manual C53000 G1876 C103 3 ...