Instruction Manual

<5. CONFIGURATION>
5-6
IM 11M12D01-61E
5.5 Communication Setting
To set the communication function, it is necessary to change the database residing in SM (System
Management)-VFD.
5.5.1 VCR Setting
The VCR (Virtual Communication Relationship) species the device and item communicated with,
and the type of resources used. Each AV550G supports 33 VCRs; the rst is used for management,
the other 32 are user-customizable.
The AV550G supports the following four types of VCR:
Server (QUB) VCR
A server responds to requests from, and is used for exchanging data with, a host.
This is called a QUB (Queued User-triggered Bidirectional) VCR.
Source (QUU) VCR
A source multicasts alarms or trends to other devices.
This is called a QUU (Queued Usertriggered Unidirectional) VCR.
Publisher (BNU) VCR
A publisher multicasts outputs of AI blocks, DI blocks, and MAI blocks to other function blocks.
This is called a BNU (Buffered Networktriggered Unidirectional) VCR.
Subscriber (BNU) VCR
A subscriber connects outputs from other function blocks to an MAO block.
Each VCR has the parameters listed in Table 5.4.
Parameters must be changed together for each VCR because modication for each parameter may
cause a contradiction.
Table 5.4 VCR Static Entry
T0504E-1.ai
Sub-
index
Parameter Description
1 FasArTypeAndRole
Indicates the type and role of communication (VCR).
The following 4 types are used for the AV550G.
0x32: Server (Responds to requests from host.)
0x44: Source (Transmits alarm or trend.)
0x66: Publisher (Sends AI, DI, MAI block output to other blocks.)
0x76: Subscriber (Connects output of other blocks to MAO block.)
2 FasDllLocalAddr
3 FasDllConfigured
RemoteAddr
Sets the node address of the called party for communication and
the address (DLSAP or DLCEP) used to specify VCR at that
address. For DLSAP or DLCEP, a range of 20 to F7 in
hexadecimal is used. Addresses in Subindex 2 and 3 need to be
set to the same contents of the VCR as the called party (local and
remote are reversed).
Sets the local DLSAP or DLCEP address to specify a VCR in the
AV550G. A range of 20 to F7 in hexadecimal.
4 FasDllSDAP
Specifies the quality of communication. Usually, one of the
following types is set.
0x2B: Server
0x01: Source (Alert)
0x03: Source (Trend)
0x91: Publisher/Subscriber
5 FasDllMaxConfirm
DelayOnConnect
To establish connection for communication, a maximum wait time
for the called party's response is set in ms. Typical value is 60
seconds (60000).