Hardware Write Protect And Burnout Direction(With Optional Code /F1); H2O Unit Select; Self-Diagnostics; Checking For Problems - YOKOGAWA Dpharp vigilantplant EJA Series User Manual

(19) Hardware Write Protect and Burnout
Direction(with Optional code /F1)
This function prohibits parameter changes through a
slide switch on a CPU assembly board. In the case the
hardware write protection switch is set to YES, none of
the communication method including the handheld
terminal such as model 275 is allowed for the alter-
ation of parameters. The write protection switch is
factory set to NO(N position in the figure below).
CPU assembly
Slide switch
Hardware write protection switch
Write Protection L
Switch Position
Y
Write Protection
Burnout direction switch
Burnout Direction L
Switch Position
Y
Burnout Direction
(20) H O Unit Select
2
When mmH O, inH O or ftH
2 2
varies with the standard temperature definition. The
Yokogawa default setting for the standard temperature
is 4°C (39.2°F). Use the procedure described below
when a standard temperature of 20°C (68°F) is re-
quired.
Call up the H O Unit select.
2
1. Device setup
4. Detailed setup
2. Signal condition

9. H2O Unit select

EJA:
H2O Unit select
@4C
@4C
@20C(68F)
HELP SEND ESC ENTER
(ENTER)
(SEND)
Select @20C (68F) and press
ENTER (F4).
Press SEND (F2) to send data.
Burnout direction switch
L H
Y N
Write protection switch
H L
N
Y
NO YES
L
H
Y
N
HIGH LOW
F02F1.EPS
O is set, the pressure
2
F0241.EPS

2.4 Self-Diagnostics

2.4.1 Checking for Problems

(1) Identify Problems with HART Communica-
tor
Self-diagnostics of the transmitter and check of
incorrect data setting can be carried out with the
HART communicator. There are two methods for self-
diagnosis of the transmitter, self-diagnosis for every
transmission and manually executing the SELF TEST
command. When an error message appears, follow
"ERROR MESSAGES".
Diagnostic by "self test"
1. Device setup
2. Diag/Service
1. Test/Status
H
N
1
EJA:
Test/status
1 Self test
2 Status
HELP SET
H
2
N
EJA:
Self test OK
DEL SET ABORT
1
EJA:
Test/status
1 Self test
2 Status
HELP SET
2
EJA:
Status
Field device not
installed
OFF
DEL PREV
2-19
2. HART COMMUNICATOR OPERATION
Call up the Test/Status, and select
HOME OK
Self test.
If there is no error detected, Self
test OK will be displayed.
When an error occurs, an error
message appears, and the results
of self-diagnosis appear in the
OK
Status item.
Call up the Status item.
HOME OK
(NEXT)
If there is no error, the result of
NEXT EXIT
diagnostics is indicated as OFF. If
ON is indicated, a countermeasure
for that error is necessary.
F0242.EPS
IM 01C22T01-01E