Siemens siprotec 7SD5 User Manual page 485

Checking a Con- For two devices linked with fibre optical cables (as in Figure 3-21 or 3-22), this con-
nection Using nection is checked as follows. If two or more devices are linked, or if two devices have
Direct Link been (double-) linked with a ring topology, first check only one link.
• Both devices at the link ends have to be switched on.
• Check in the operating indications or in the spontaneous indications:
• In case of an incorrect communication link, the message „PI1 Data fault" (No.
Continue with the margin heading „Consistency of Topology and Parameterization".
Checking a Link If a communication converter is used, please note the instructions enclosed with the
with a Communica- device. The communication converter has a test setting where its outputs are looped
tion Converter back to the inputs.
Links via the communication converter are tested by means of local loop-back (Figure
3-23, left).
Figure 3-23 Protection data communication via communication converter and communication network — schematic
example
DANGER!
Opening the Communication Converter
There is danger to life by energized parts.
Before opening the communication converter, it is absolutely necessary to isolate it
from the auxiliary supply voltage at all poles!
7SD5 Manual
C53000-G1176-C169-1
– If the message „PI1 with" (protection data interface 1 connected with No.
3243) is provided with the device index of the other device, a link has been es-
tablished and one device has recognized the other.
– If the protection data interface 2 has also been connected, a corresponding
message will appear (No. 3244).
– The device also indicates the device index of the device which communicates
correctly (e.g. annunciation „Rel2 Login", No. 3492, when relay 2 has been
contacted).
3229) or „PI2 Data fault" (No. 3231) will appear. In this case, recheck the fibre
optical cable link.
– Have the devices been linked correctly and no cables been mixed up?
– Are the cables free from mechanical damage, intact and the connectors locked?
– Otherwise repeat check.
3.3 Commissioning
485