Yokogawa digitalYEWFLO (DY) - Manual (Page 74)

<9. OPERATION VIA HART CONFIGURATION TOOL (HART 7)>
9-2
IM 01F06A00-01EN
9.4 Interconnection between
digitalYEWFLO and HART
Confi guration Tool
The HART Confi guration Tool can interface with
the digitalYEWFLO from the control room, the
digitalYEWFLO site, or any other wiring termination
point in the loop, provided there is a minimum load
resistance of 250
Ω between the connection and
the receiving instrument. To communicate, it must
be connected in parallel with the digitalYEWFLO,
and the connections must be non-polarized. Figure
9.2 illustrates the wiring connections for a direct
interface at the digitalYEWFLO site. The HART
Confi guration Tool can be used for remote access
from any terminal strip as well.
+
–
4 to 20 mA DC signal line
Control room
Terminal board
Receiving instrument
load resistance:
250
Ÿ to 600 Ÿ
Relaying
terminals
HART
Configuration Tool
HART
Configuration Tool
HART
Configuration Tool
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digitalYEWFLO
SUPPLY
SUPPLY
+
–
Figure 9.2 Connecting the HART Communicator
WARNING
Be sure to set parameters as “Protect” on the
write protect function after fi nish of parameter
setting work.
Refer to Section 9.9 “Software Write Protect”
how to use the write protect function in detail.
IMPORTANT
If the power of fl owmeter is turned off within 30
seconds after parameters have been set, these
settings will be canceled. Accordingly, please
keep the power on for at least 30 seconds after
setting parameters.
NOTE
Before updating any setting, remember to
always check the data content you want to
change as described in Section 6.4 “Parameters
Description”.
9.5 Basic Setup
 Tag and Device Information
The tag number and device information can be
checked as follows:
• Procedure to call up the tag number and device
information
Tag [Root Menu] → Basic setup → Tag
or [Root Menu] → Detailed setup
→ Device information → Tag
or [Root Menu] → Review → Review1 → Tag
Long Tag [Root Menu] → Basic setup → Long Tag
or [Root Menu] → Detailed setup
→ Device information → Long Tag
or [Root Menu] → Review → Review1
→ Long Tag
Descriptor or [Root Menu] → Detailed setup
→ Device information → Descriptor
or [Root Menu] → Review → Review1
→ Descriptor
Message or [Root Menu] → Detailed setup
→ Device information → Message
or [Root Menu] → Review → Review1
→ Message
Date or [Root Menu] → Detailed setup
→ Device information → Date
or [Root Menu] → Review → Review1 → Date
When changing the tag number or device
information, enter the information directly within the
following limitations.
Item Limitations
Tag Up to 8 characters or numbers *1
Long Tag
(HART 7 only) Up to 32 characters or numbers *2
Descriptor Up to 16 characters or numbers *1
Message Up to 32 characters or numbers *1
Date yyyy/mm/dd
- mm : month (2 digits)
- dd : days (2 digits)
- yy : years (2 digits)
SPACE ! " # $ % & ' ( ) * + , - . /
0 1 2 3 4 5 6 7 8 9 : ; < = > ?
@ A B C D E F G H I J K L M N O
P Q R S T U V W X Y Z [ \ ] ^ _
` a b c d e f g h i j k l m n o
p q r s t u v w x y z { | } ~
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*1: The characters bounded by the thick line in the following
table can be used.
*2: All characters in the following table can be used.