IM 01C25T03-01E
3-11
3. OPERATION
(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.
F0323.EPS
Then press the (OK) key.
(10) CPU Failure Burnout Direction and Hard-
ware 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)
F0324.EPS
The parameter of D25: BURNOUT displays the status
of 4-20 mA DC output if a CPU failure occurs. In case
of a failure, communication is disabled.
Standard specifications
The burnout direction switch is set to HIGH. If a
failure occurs, the transmitter outputs a 110% or higher
signal.
Option code /C1
The burnout direction switch is set to LOW. If a failure
occurs, a –5% or lower output is generated.
• Example: Standard specifications
Slide switch position: H
D25: BURNOUT
HIGH
F0325.EPS
• Example: Option code /C1
Slide switch position: L
D25: BURNOUT
LOW
(11) Software Write Protect (D55: WRT PRO-
TECT, D56: WRT ENABLE, D57: NEW
PASSWORD)
EJX configured data can be saved by the write protect
function. Write protect status (D55: WRT PROTECT)
is set from
NO
to
YES
when eight alphanumerics are
entered in the parameter of D57: NEW PASSWORD.
Accordingly, the transmitter does not accept any
parameter changes. When the eight alphanumeric
password is entered in the parameter of D56: WRT
ENABLE, the transmitter accepts parameter changes
during a 10 minute period.
To cancel the transmitter for the software write
protection completely,
use D56: WRT ENABLE to
first release the write protect function and then enter
eight spaces in the D57: NEW PASSWORD field.
The software write protection does not affect the
function of external zero adjustment screw.
To disable the external zero adjustment screw, set the
parameter of J15: EXT ZERO ADJ to INHIBIT before
activating the software write protection.
