Yokogawa Electric Corporation - TC10-L - ENGINEERING MANUAL - PAG. 13
6.3 ACCESS LEVELS AND SPECIFIC
PARAMETERS
The instrument is showing the “standard display”
This instrument is equipped with 3 different access
levels:Level 1 – Operator Mode.(not protected by password)
Level 2 – Operator modify parameter (protected by a pro-
grammable password [default 20])
Level 3 – Confi guration parameters mode (protected by pro-
grammable password [default 30])
• The operator area (Level 1) allows: confi rmation
action, to see and to reset the << tim >> parameter
(time duration of the last shutdown condition detected)
and to see and to reset the << Min/max >> (minimum
or maximum measured value during last shutdown
condition detected).
Note:
when a new shutdown condition is detected, the
instrument automatically reset << tim>> and << min/
max >> parameters and start to memorize the values
related with the new shutdown condition only. At the
end of the shut down condition, <<tim>> and <<min/
max>> can be read and reset.
• The Level 2 area encompasses the following
parameters:
Param.
Description
Dec.
Point
SP
Set point (shutdown set point)
dP
AL1L
For high or low alarm, it is the low limit of AL1
threshold
dP
For band alarm, it is low alarm threshold
AL1H
For high or low alarm, it is the high limit of AL1
threshold
dP
For band alarm, it is high alarm threshold
AL1
Alarm 1 threshold
dP
AL2L
For high or low alarm, it is the low limit of AL2
threshold
dP
For band alarm, it is low alarm threshold
AL2H
For high or low alarm, it is the high limit of AL2
threshold
dP
For band alarm, it is high alarm threshold
AL2
Alarm 2 threshold
dP
HyS
Hysteresis of the shutdown control (relay hyster-
esis for control output)
dP
Fil
Digital filter on the measured value
1
bS
PV input bias
6.4 ENTER THE “OPERATOR MODIFY
PARAMETER”
The instrument is showing the “standard display”.
1.
Press the
button for more than 3 seconds;
2.
The upper display will show
PASS
while the lower display
will show
0
;
3.
By
and
buttons set the value assigned to [44]
PAS2 (Level 2 password).
Notes: 1.
The factory default password for confi guration
parameters is equal to 20.
2.
All parameter modifi cation are protected by a
time out. If no button is pressed for more than
30 second the instrument comes automatically
back to the Standard display, the new value of the
last selected parameter is lost and the parameter
modifi cation procedure is closed.When you
desire to remove the time out (e.g. for the fi rst
confi guration of an instrument) you can use a
password equal to 1000 plus the programmed
password (e.g. 1000 + 20 [default] = 1020).It is
always possible to manually End the parameter
confi guration procedure (see below).
4.
Push
button.
5.
The instrument will show on the upper display the
acronym of the fi rst parameter promoted to this level and
on the lower display its value.
6.
By
and
buttons assign to this parameter the
desired value.
7.
Press the
button in order to memorize the new value
and go to the next parameter.
8.
When you want to come back to the “standard display”
push the
button for more than 3 s.
6.5 HOW TO SEE BUT NOT MODIFY THE
“OPERATOR MODIFY PARAMETERS
ACCESS PARAMETERS”
Sometime it is necessary to let the possibility to see the
value assigned to the Operator Modify Parameter but it is
important that changes are made by authorized personnel
only.In this cases, proceed as follows:
1.
Press the
button for more than 3 seconds;
2.
The upper display will show
PASS
while the lower display
will show
0
;
3.
By
and
button set the value
-181
;
4.
Push
button;
5.
The upper display will show the acronym of the fi rst
parameter promoted to the level 2 and lower display will
show its value;
6.
Using
button it is possible to see the value assigned
to all parameter present in level 2 but it will not be
possible to modify it;
7.
It is possible to come back to the “standard display” by
pushing the
button for more than 3 seconds or by
pushing no pushbutton for more than 30 seconds.
