Siemens SIPROTEC 6MD665, Руководство пользователя

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2.9 Process bus link
93
6MD665 Manual
C53000-G1876-C103-3
Figure 2-48 Allocation matrix
Process bus failure
indication For each connection to a PCU, a Fault_xxx failure indication is created automatically.
This information can be assigned to the Warning indications buffer and, if informa-
tion is taken from the process bus, taken into account in the context of the switchgear
interlocking.
Allocating process bus
Before beginning with the allocation, you should create a concept for it. Here, you har-
monise the required input and output information with the number of available physical
inputs and outputs in the device. Note the different types of indications and commands
and their requirements.
Indications from the
process bus Indications which are received via the process bus are identified as "external indica-
tions". The information objects are created by importing the data from ModPara or are
copied from the DIGSI
®
information catalogue.
Commands to the
process bus Commands to the process bus are commands which are forwarded to the process bus
after having passed a command check. The command procedure is monitored com-
pletely in 6MD665. As the command execution is carried out in the separated process
modules, these commands are also identified as "external commands". The informa-
tion objects are created by importing the data from ModPara or copied from the DIGSI
information catalogue.
The command types are:
• Single command without feedback ExC
• Single command with feedback ExCF
• Double command without feedback ExC_D
• Double command with feedback ExCF_D
In addition, a signal relay can be allocated to the relay of the device. With the process
control device, command output via the process bus is normal.