Yokogawa EJA115 - Manual (Page 46)

IM 01C22T02-01E A-8
APPENDIX 2. APPLICATION, SETTING AND CHANGE OF BASIC PARAMETERS
A2.2 Setting and Change of
Basic Parameters
This section describes the procedure taken to set and
change the parameters for each block. Obtaining access
to each parameter differs depending on the configura-
tion system used. For details, refer to the instruction
manual for each configuration system.
Access the parameter to be set or changed.
Make setting or change in accordance with
each parameter.
Set the Target of block mode (MODE_BLK)
back to Auto
(*Note 2) .
Access the block mode (MODE_BLK) of each
block.
FA0201.EPS
Set the Target (*Note 1) of block mode
(MODE_BLK) to Auto, Man or O/S (*Note 2)
according to the Write Mode of the parameter
to be set or changed.
IMPORTANT
Do not turn the power OFF immediately after
parameter setting. When the parameters are
saved to the EEPROM, the redundant process-
ing is executed for an improvement of reliability.
Should the power be turned OFF within 60
seconds after setting of parameters, changed
parameters are not saved and may return to
their original values.
Note 1: Block mode consists of the following four modes that are
controlled by the universal parameter that displays the
running condition of each block.
Target:
Sets the operating condition of the block.
Actual: Indicates the current operating condition.
Permit: Indicates the operating condition that the block is
allowed to take.
Normal: Indicates the operating condition that the block will
usually take.
Note 2: The following are the operating conditions which the
individual blocks will take.
AI Function
Block
Automatic (Auto) Yes Yes Yes
Yes
Yes Yes Yes
TA0202.EPS
Manual (Man)
Out of Service (O/S)
Transducer
Block
Resource
Block
Refer to the “List of parameters for each block of the
EJA” for details of the Write Mode for each block.
A2.3 Setting the AI1 Function
Block
The AI1 function block outputs the differential
pressure signals.
(1)Setting the calibration range
FA0202.EPS
Access the XD_SCALE parameter.
Set the higher range value to EU at 100% on
XD_SCALE.
Set the lower range value to EU at 0% on
XD_SCALE.
Set the necessary unit to Units Index.
Set the decimal position of 2 to Decimal Point.
Example:
To measure 0 to 100kPa,
Set 100 to EU at 100% on XD_SCALE,
Set 0 to EU at 0% on XD_SCALE, and
Set 1133 to Units Index on XD_SCALE
(*Note) .
Note 1: Each unit is expressed using a 4-digit numeric code. Refer to
the table 5.15 in 5.6.3 for each unit and the corresponding 4-
digit codes.
Note 2: Consider the following precautions when selecting each unit.
• Do not select a unit in gauge for an absolute pressure gauge
(EJA310).
• Do not select the unit in abs for a gauging pressure gauge
(EJA430, EJA438W, and EJA438N).
(2)Setting the output scale
FA0203.EPS
Access the OUT_SCALE parameter.
Set an output value corresponding to the
higher range value to EU at 100% on
OUT_SCALE.
Set an output value corresponding to the lower
range value to EU at 0% on OUT_SCALE.
Set the necessary unit of output to Units Index.
Set the decimal position to Decimal Point.
Example:
To set the output to 0.00 to 100.00%,
Set 100 to EU at 100% on OUT_SCALE,
Set 0 to EU at 0% on OUT_SCALE,
Set 1342 to Units Index on OUT_SCALE , and
Set 2 to Decimal Point on OUT_SCALE.