Yokogawa EJX440A - Manual (Page 20)

IM 01C25T03-01E 3-12
3. OPERATION
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.
a. Setting Password
(D57: NEW PASSWORD)
Enter 1234ABCD.
Then status of parameter D55:
WRT PROTECT becomes YES.
F0340.EPS
• Example: Set the password to 1234ABCD.
SET
D57:NEW PASSWORD
1234ABCD
CODE CAPS CLR ESC
SET
D57:NEW PASSWORD
1234ABCD
FEED NO OK
Press the key twice
to enter the setting.
Press the (OK) key.
b. Entering Password to Enable Parameter
Change (D56: WRT ENABLE)
Enter the password.
Parameter changes are available
for 10 minutes.
F0341.EPS
• Example: Enter the password of 1234ABCD.
SET
D56:WRT ENABLE
1234ABCD
CODE CAPS CLR ESC
SET
D56:WRT ENABLE
PASS
FEED NO OK
Press the key twice
to enter the setting.
Press the (OK) key.
c. Releasing Password
(D57: NEW PASSWORD)
To release the password, enter eight spaces at D57:
NEW PASSWORD during the period that the param-
eter change is possible.
d. Software Seal
(D58: SOFTWR SEAL)
When you lose the password that has been registered, it
is possible to release the write protect function by
using general password, “YOKOGAWA.” When the
password is used, the status shown in the parameter of
D58: SOFTWR SEAL is changed from
KEEP to
BREAK . The status returns to KEEP by entering a
newly set password at D56: WRT ENABLE.