Yokogawa EJA440E - Manual (Page 20)

<3. Operation>
3-12
IM 01C25T03-01E
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
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• Example: Option code /C1
Slide switch position: L
D25: BURNOUT
LOW
(11) Software Write Protect
(D55: WRT PROTECT, D56: WRT
ENABLE, D57: NEW PASSWORD)
Transmitter 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 D57:
NEW PASSWORD. Accordingly, the transmitter
does not accept any parameter changes. When
the eight alphanumeric password is entered in the
parameter 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 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.
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• 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.
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• 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
parameter 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. Contact
Yokogawa about the general password. When
the password is used, the status shown in the
parameter D58: SOFTWR SEAL is changed from
KEEP to BREAK. The status returns to KEEP
by entering a newly set password at D56: WRT
ENABLE.