Configuration
5-54
7SA6 Manual
C53000-G1176-C156-2
5.6 Serial Interfaces
Note:
The protection data interfaces for protection transmission are described in Section 6.4
in the protection functions.
The device contains one or more serial interfaces: an operator interface integrated into
the front panel, and — depending on the model ordered — a service interface and a
system interface for connection of a central control system. Certain standards are nec-
essary for communication via these interfaces, which contain device identification,
transfer protocol, and transfer speed.
Configuration of these interfaces is performed using the DIGSI
®
4softwareprogram.
Click on Setting in the navigation window and double-click in the data window on
Interfaces. Next, select the specific data in the resulting dialogue box (Figure 5-
51). The dialogue box contains a varying number of tabs (depending on the capabili-
ties of the PC and the relay) with setting options for the interfaces.
Figure 5-51 DIGSI
®
4, Settings of the PC interface — example
Serial port on PC In the first tab, you enter the communication interface of the PC which is connected to
the7SA6relay(COM1, COM2, etc.). Manual entry of settings for data format and
baud-rate need not be made if these values were taken from the “Operator Inter-
face”taborthe“Service interface” tab (if present). In fact, many settings are
read from DIGSI
®
4 directly via the interface, and the corresponding setting fields are
then inaccessible (see Figure 5-51). Alternatively, the option Independent of de-
vice may be selected.
Data exchange is monitored by the PC for the reaction times of the device. You may,
within preset limits, configure maximum relay reaction times. The displayed values
RQ 1 and RQ 2 correspond to the preset reaction times in milliseconds. In general,
these values should not be modified. Modification is only necessary if a time-out often
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