YOKOGAWA Dpharp vigilantplant EJA Series, User Manual

Page: 26 / 31

IM 01C22T01-01E 2-19
2. HART COMMUNICATOR OPERATION
(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).
HIGH LOW
CPU assembly
Slide switch
Burnout direction switch
Write protection switch
Write Protection
Switch Position
Burnout Direction
Switch Position
L H
Y N
L H
Y N
L H
Y N
L H
Y N
L H
Y N
Write Protection
Hardware write protection switch
Burnout direction switch
Burnout Direction
YES NO
F02F1.EPS
(20) H
2
O Unit Select
When mmH
2
O, inH
2
O or ftH
2
O is set, the pressure
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
2
O Unit select
.
F0241.EPS
(ENTER)
EJA:
H2O Unit select
@4C
@4C
@20C(68F)
HELP SEND ESC ENTER
Select @20C (68F) and press
ENTER (F4).
Press SEND (F2) to send data.
(SEND)
1. Device setup
4. Detailed setup
2. Signal condition
9. H2O Unit select
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
F0242.EPS
Call up the Test/Status, and select
Self test.
EJA:
Test/status
1 Self test
2 Status
HELP SET HOME OK
EJA:
Self test OK
DEL SET ABORT OK
2
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
Status item.
1. Device setup
2. Diag/Service
1. Test/Status
1
Call up the Status item.
If there is no error, the result of
diagnostics is indicated as OFF. If
ON is indicated, a countermeasure
for that error is necessary.
EJA:
Test/status
1 Self test
2 Status
HELP SET HOME OK
EJA:
Status
Field device not
installed
OFF
DEL PREV NEXT EXIT
2
(NEXT)