Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 25)

<5. CONFIGURATION>
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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) specifies the device and item communicated with,
and the type of resources used. Each AV550G supports 33 VCRs; the first 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 modification 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).