Yokogawa EJX930A - Manual (Page 24)

<3. Parameter Setting>
3-13
IM 01C25R02-01E
3.2 Basic Setup
IMPORTANT
After setting and sending data with the HART
configuration tool, wait 30 seconds before
turning off the transmitter. If it is turned off
too soon, the settings will not be stored in the
transmitter.
3.2.1 Tag and Device Information
If there are specified when ordering, the desired Tag
No. and device information are set and shipped.
Tag No. and device information can be checked as
follows.
• Procedure to call up the display using DD
(HART 5/HART 7) and DTM (HART 7)
Item Procedure
Tag [Root Menu] → Basic setup → Tag
Long Tag
(HART 7 only)
[Root Menu] → Basic setup → Long
Tag
Descriptor [Root Menu] → Basic setup → Device
information → Descriptor
Message [Root Menu] → Basic setup → Device
information → Message
Date [Root Menu] → Basic setup → Device
information → Date
• Procedure to call up the display using DTM
(HART 5)
Item Procedure
Tag Easy Setup → Tag
or Configuration → HART → Tag
Descriptor Configuration → Device information 1
→ Descriptor
Message Configuration → Device information 1
→ Message
Date Configuration → Device information 1
→ Date
When the Tag No. and device information are
changed, input them based on 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 mm/dd/yyyy
- mm: month (2 digits)
- dd: days (2 digits)
- yyyy: years (4 digits)
*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.
SP ! " # $ % & ' ( ) * + , - . /
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 { | } ~
*: SP shows one-byte space
3.2.2 Process Variable Setup
The multivariable transmitter can handle five kinds
of Device Variables; differential pressure (DP),
static pressure (SP), external temperature (ET), and
also flow rate and total flow which are calculated by
using these values.
Four data selected from these five data can be
assigned to Dynamic Variables; PV (Primary
Variable), SV (Secondary Variable), TV (Tertiary
Variable) and 4V* (Fourth Variable) or QV*
(Quaternary Variable).
Data assigned for PV become the 4 to 20mA
current output.
Total flow can not be assigned to PV.
These data are set as follows when the instrument
is shipped.
In case of measurement function code is “A” (Multi
sensing):
PV: Differential pressure
SV: Static pressure
TV: External temperature
4V/QV*: Flow rate
In case of measurement function code is “B” (Mass
flow measurement):
PV: Flow rate
SV: Differential pressure
TV: Static pressure
4V/QV*: External temperature
*: 4V is for HART 5, QV is for HART 7