7) unit setup for displayed temperature, 8) operation mode setup, 9) impulse line connection orientation setup – Yokogawa EJX115A User Manual
Page 19: 8) operation mode setup (d22: rev output)
<3. Operation>
3-11
IM 01C25T03-01E
d. Setting Static Pressure Unit and Scale
(D30: SP UNIT, D33: SP LRV, and D34: SP
URV)
Static pressure can be displayed in measured
input static pressure or in %, independent from
the 4-20 mA output signal of measured pressure
or differential pressure. These parameters allow
the entry of the static pressure unit and scale to be
displayed.
Note that the parameter D37: SP SELECT can be
used to select either the high or low pressure side of
the capsule to monitor the static pressure.
(7) Unit Setup for Displayed Temperature
(D40: TEMP UNIT)
When the instrument is shipped, the temperature
units are set to
degC. Follow the procedure
below to change this setting. Note that changing
the unit here changes the unit for A30: CAPSULE
TEMP (capsule temperature) and J45: AMP TEMP
(amplifier temperature).
• Example: Change the unit for the temperature
display
degC to degF.
ESC
SET
D40:TEMP UNIT
degC
< degC >
< degF >
< K >
Use the or key
to select
degF.
Press the key twice to
enter the setting.
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Then press the (OK) key.
(8) Operation Mode Setup
(D22: REV OUTPUT)
This parameter allows the direction of the 4-20 mA
output to be reversed with respect to input. Follow
the procedure below to make this change.
• Example: Change 4 to 20 mA output to 20 to
4 mA output.
ESC
SET
D22:REV OUTPUT
NORMAL
< NORMAL >
< REVERSE>
Use the or key
to select
REVERSE.
Press the key twice to
enter the setting.
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Then press the (OK) key.
(9) Impulse Line Connection Orientation
Setup
(D15: H/L SWAP)
This function reverses the impulse line orientation.
Follow the procedure below to make this change.
• Example:
Assign the high pressure impulse
line connection to the L side of
the transmitter
.
ESC
SET
D15:H/L SWAP
NORMAL
< NORMAL >
< REVERSE>
Use the or key
to select
REVERSE.
Press the key twice to
enter the setting.
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Then press the (OK) key.
(10) CPU Failure Burnout Direction and
Hardware Write Protect
(D25: BURNOUT)
There are two slide switches on the CPU assembly
board. One sets the burnout direction at CPU
failure, and the other sets a write protection function
which disables parameter changes through
the use of a handheld terminal or some other
communication method.
HIGH
LOW
CPU assembly
Slide switch
Burnout direction switch
Write protection switch
Write Protection
Switch Position
Burnout Direction
Switch Position
BO H
L
WR E
D
H
L
E
D
H
L
E
D
H
L
E
D
H
L
E
D
Hardware write protection switch (WR)
Burnout direction switch (BO)
Burnout Direction
Write Protection
YES
(Write disabled)
NO
(Write enabled)
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The parameter D25: BURNOUT displays the status
of 4-20 mA DC output if a CPU failure occurs. In
case of a failure, communication is disabled.