IM 01C25T02-01E
4-3
4. GETTING STARTED
4.3 Bus Power ON
Turn on the power of the host and the bus. Where the
EJX is equipped with an LCD indicator, first all
segments are lit, then the display begins to operate. If
the indicator is not lit, check the polarity of the power
supply.
Using the host device display function, check that the
EJX is in operation on the bus.
The device information, including PD tag, Node
address, and Device ID, is described on the sheet
attached to the EJX. The device information is given in
duplicate on this sheet.
DEVICE INFORMATION
Device ID : 594543000CXXXXXXXX
PD Tag : PT2001
Device Revision : 3
Node Address : 0xf3
Serial No. : XXXXXXXXXXXXXXXXX
Physical Location :
Note:
Our Device Description Files and Capabilities Files available at
http://www.yokogawa.com/fld (English) or
http://www.yokogawa.co.jp/Sensor/fieldbus/fieldbus.htm (Japanese)
DEVICE INFORMATION
Device ID : 594543000CXXXXXXXX
PD Tag : PT2001
Device Revision : 3
Node Address : 0xf3
Serial No. : XXXXXXXXXXXXXXXXX
Physical Location :
Note:
Our Device Description Files and Capabilities Files available at
http://www.yokogawa.com/fld (English) or
http://www.yokogawa.co.jp/Sensor/fieldbus/fieldbus.htm (Japanese)
F0403.EPS
Figure 4.3 Device Information Sheet Attached to EJX
If no EJX is detected, check the available address
range and the polarity of the power supply. If the node
address and PD tag are not specified when ordering,
default value is factory set. If two or more EJXs are
connected at a time with default value, only one EJX
will be detected from the host as EJXs have the same
initial address. Separately connect each EJX and set a
different address for each.
4.4 Integration of DD
If the host supports DD (Device Description), the DD
of the EJX needs to be installed. Check if host has the
following directory under its default DD directory.
594543\000C
(594543 is the manufacturer number of Yokogawa
Electric Corporation, and 000C is the EJX device
number, respectively.)
If this directory is not found, the DD of the EJX has
not been included. Create the above directory and copy
the DD file (0m0n.ffo, 0m0n.sym) (m, n is a numeral)
into the directory. ‘0m’ in the file name shows the
device revision, and ‘0n’ shows the DD revision. If
you do not have the DD or capabilities files, you can
download them from our web site:
http://www.yokogawa.com/fld
Once the DD is installed in the directory, the name and
attribute of all parameters of the EJX are displayed.
Off-line configuration is possible by using capabilities
files.
EJX has two capabilities levels, “1” and “2”.
Select “Capabilities level = 1” when the EJX don’t
have LC1(PID function) option.
Select “Capabilities level = 2” when the EJX has
LC1(PID function) option.
The capabilities level defines the kind and the number
of function blocks that can be used.
The table below shows the relation.
The relation between and function blocks that can be used
T0402.EPS
3
AI SC IT IS AR PID
Capabilities
Level
1
2
11110
311111
4.5 Reading the Parameters
To read EJX parameters, select the AI1 block of the
EJX from the host screen and read the OUT parameter.
The current selected signal is displayed. Check that
MODE_BLOCK of the function block and resource
block is set to AUTO, and change the signal input and
read the parameter again. A new designated value
should be displayed.
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