Yokogawa EJX530B - Manual (Page 51)

<8. Setting Parameters>
8-18
IM 01C27F01-01EN
NOTE
When the device detects AL01 and AL02, the
LCD display stays on regardless of the status
in LCD mode. See Table 9.3 and 9.4 Alarm
Message for details.
8.3.4 Tag and Device Information
If these are specified when ordering, the designated
Tag No. and device information are set and
shipped. Tag No. and device information can be
checked as follows.
• Procedure to call up the tag No. and device
information
- Device Tag ( Software Tag )
This is specified when writing characters (up
to 16 characters) of amplifiers TAG that differ
from characters specified in Tag No.
Refer to section 7.4 “Connection to the Field
Wireless Network” for confirmation.
- Tag Description
This is a universal parameter to store the
comment that describes the content of the
tag located in the TRANSDUCER and AI
blocks.
The AI1 and AI3 blocks of the AI blocks
correspond to the pressure and temperature,
respectively.
• When changing the device information, input
the information based on the following limitation
on the number of characters.
- Message function (up to 32 characters)
TRANSDUCER block : Tag Description
AI1, AI3 block : Tag Description
8.3.5 Unit
The unit parameter is set at the factory before
shipment if specified at the time of order. Follow the
procedure below to change the unit parameter.
• Procedure to call up the Unit display (Units
Index)
Al1, Al3 block : Scale.Units Index
To change the Unit display, choose desired unit
among the list of displayed unit selecting AI1
block as for the pressure, and AI3 block as for
temperature in the AI blocks.
8.3.6 Range Change
The range values are factory-set as specified by
the customer. To change the range, follow the steps
below.
The measurement span is determined by the upper
and lower range values. In this method, the upper
and lower range values can be set independently,
and the span changes according to the range limit
values sent to the transmitter.
• Procedure to call up the PV Range display.
AI1 block : PV Range
Select the AI1 block for the pressure, then
select “EU at 0%” and “EU at 100%” displayed
in the PV Range parameters. And input the
lower range and upper range values for the
range.
8.3.7 Output Signal Low Cut Mode Setup
Low cut mode can be used to stabilize the output
signal near the zero point.
( There is 10% of hysteresis at only point of
transition from low to high)
[Setup Low Cut Value]
• Procedure to call up the Lower cutoff* display
AI1 block : Lower cutoff*
Example: setup LOW_CUT of output to 15%
Lower cutoff*
= (“Eu at 100%” - “Eu at 0%”) × 0.15 + “Eu at 0%”
*: “Low Cutoff” is used instead of “Lower cutoff” for
Detachable antenna type (Amplifier housing code: 8 or
9).
[Setup Low Cut Mode]
• Procedure to call up the Low Cut Mode display
AI1 block : Low Cut Mode
F0804.ai
(%)
50
20
0 50 (%)
For low cut in Linear mode For low cut in Zero mode
Example:
Low cut 20%
Input
(%)
50
20
0 50 (%)
Example:
Low cut 20%
Input
Output Output
Figure 8.3 Low Cut Mode