Yokogawa EJX930A - Manual (Page 31)

<5. Configuration>
5-4
IM 01C25R03-01E
EJX multivariable transmitter has a PD Tag
(FT2001) and node address (245, or hexadecimal
F5) that are set upon shipment from the factory
unless otherwise specified. To change only the
node address, clear the address once and then set
a new node address. To set the PD Tag, first clear
the node address and clear the PD Tag, then set
the PD Tag and node address again.
Devices whose node addresses have been cleared
will have the default address (randomly chosen
from a range of 248 to 251, or from hexadecimal
F8 to FB). At the same time, it is necessary to
specify the device ID in order to correctly specify
the device. The device ID of the EJX multivariable
transmitter is 594543000Exxxxxxxx. (The xxxxxxxx
at the end of the above device ID is a total of 8
alphanumeric characters.)
5.5 Communication Setting
To set the communication function, it is necessary
to change the database residing in SM-VFD.
5.5.1 VCR Setting
Set VCR (Virtual Communication Relationship),
which specifies the called party for communication
and resources. EJX multivariable transmitter has 33
VCRs whose application can be changed, except
for the first VCR, which is used for management.
EJX multivariable transmitter has VCRs of four
types:
Server(QUB) VCR
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.
Source (QUU) VCR
A Source multicasts alarms or trends to other
devices. This type of communication is called
QUU (Queued User-triggered Unidirectional)
VCR.
Publisher (BNU) VCR
A Publisher multicasts block output to another
function block(s). This type of communication
is called BNU (Buffered Network-triggered
Unidirectional) VCR.
Subscriber (BNU) VCR
A Subscriber receives output of another
function block(s).
A Server VCR is capable to responding to
requests from a Client (QUB) VCR after the Client
successfully initiates connection to the Server. A
Source VCR transmits data without established
connection. A Sink (QUU) VCR on another device
can receive it if the Sink is configured so. A
Publisher VCR transmits data when LAS requests
so. An explicit connection is established from
Subscriber (BNU) VCR(s) so that a Subscriber
knows the format of published data.
Each VCR has the parameters listed in Table 5.4.
Parameters must be changed together for each
VCR because modification of individual parameters
may cause inconsistent operation.
Table 5.4 VCR Static Entry
Sub-
index
Parameter Description
1 FasArTypeAndRole Indicates the type and
role of communication
(VCR). The following 4
types are used for EJX.
0x32: Server
(Responds to
requests from
host.)
0x44: Source
(Transmits alarm
or trend.)
0x66: Publisher (Sends
block output to
other blocks.)
0x76: Subscriber
(Receives output
of other blocks.)
2 FasDllLocalAddr Sets the local address
to specify VCR in EJX.
A range of 20 to F7 in
hexadecimal.
3 FasDllConfigured
RemoteAddr
Sets the node address
of the called party for
communication and
the address (DLSAP
or DLCEP) used to
specify VCR in 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).