Communication Setting; Vcr Setting; Function Block Execution Control - GE FVP110 Maintenance Manual

Communication Setting

Communication Setting
To set the communication function, it is necessary to change the database residing in
SM-VFD.

VCR Setting

Set VCR (Virtual Communication Relationship), which specifies the called party for
communication and resources. FVP110 has 29 VCRs whose application can be
changed, except for the first VCR, which is used for management. Change parameters
together for each VCR, as modification for each parameter can cause inconsistent
operation.
FVP110 has VCRs of four types:
Server (QUB) VCR
Source (QUU) VCR
Publisher (BNU) VCR A Publisher multicasts AI block output to another function
Subscriber (BNU)
VCR

Function Block Execution Control

Use the instructions given in "Definition of Combining Function Blocks" on page 92 to
set the execution cycle of the function blocks and schedule of execution.
A Server responds to requests from a host. This communication
needs data exchange. This type of communication is called
QUB (Queued User-triggered Bidirectional) VCR.
A Server VCR is capable to respond to requests from a Client
(QUB) VCR after the Client initiates connection to the Server
successfully.
A Source multicasts alarms or trends to other devices. This type
of communication is called QUU (Queued User-triggered Unidi-
rectional) VCR.
A Source VCR transmits data without established connection.
A Sink (QUU) VCR on another device can receive if the Sink is
so configured.
block(s). This type of communication is called BNU (Buffered
Network-triggered Unidirectional) VCR.
A Publisher VCR transmits data when LAS so requests.
A Subscriber receives the data from another function block(s).
This type of communication is called BNU (Buffered Net-
work-triggered Unidirectional) VCR.
An explicit connection is established from Subscriber (BNU)
VCR(s) so that a Subscriber knows the format of published
data.
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Configuration