Yokogawa Electric Corporation - TC10 - ENGINEERING MANUAL - PAG. 22
1.
Push 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 a password equal to
-81
.
4.
Push
button.
The instrument will show the acronym of the first
configuration parameter group “
]inp
”.
5.
By
button select the group of the first parameter of
your list.
6.
By
button select the first parameter of your list
7.
The upper display will show the acronym of the parameter
while the lower display will show his current promotion level.
The promotion level is defined by a letter followed by a
number.
The letter can be:
c
: It shows that this parameter is
NOT
promoted
and it is present only in configuration.
In this case the number is forced to zero.
A
: It shows that this parameter has been promoted
to the limited access level.
The number will show the position in the limited
access list.
o
: It shows that the parameter has been promoted
to the Operator level.
The number will show the position in the limited
access list.
8.
By
and
buttons assign to this parameter the
desired position.
Note:
Setting a value different from 0 the letter
c
will change
automatically to
A
and the parameter is automatically
promoted to the limited access level.
9.
In order to modify the level from limited access
to operator and vice versa, push
button and,
maintaining the pressure, push
button.
The letter will change from
A
to
o
and vice versa.
10.
Select the second parameter that you want to add to the
assistance level and repeat step 6, 7 and 8.
11.
Repeat step 5, 6, 7, 8 until the list has been completed.
12.
When you need to exit from promotion procedure, push
button and maintain the pressure for more than 10 s.
The instrument will show the “standard display”.
Note:
When you set the some number to two parameter,
the instrument will use only the last programmed
parameter.
Example:
In the previous example, I have set for SP2 a
promotion value equal to A3.
If now I set for SP3 a promotion value equal to
o3
, the
Limited Access list and the operator list becomes.
Parameter
Promotion
Limited Access
Operator
- OPEr -
o 1
OPEr
OPEr
- SP -
o 2
SP
SP
- SP3 -
o 3
SP3
SP3
- A.SP -
A 4
A.SP
- AL1 -
o 5
AL1
AL1
7. OPERATIVE MODES
As we said at paragraph 4.1, when the instrument is
powered, it starts immediately to work according to the
memorized parameter value.
In other words, the instrument has one status only, the “run
time” status.
During “run time” we can force the instrument to operate
in three different modes: Automatic mode, Manual mode or
Stand by mode:
–
In
Automatic mode
the instrument drives automatically
the control output according to the parameter value set
and the set point/measured value.
–
In
Manual mode
the the upper display shows the measured
value while the lower display shows the power output The
lower display shows the power output [preceded by
H
(for
heating) or
C
(for cooling)], MAN is lit
and the instrument
allows you to set manually the control output power.
No Automatic action will be made.
–
In
Stand by
mode the instrument operates as an indicator.
It will show on the upper display the measured value and
on the lower display the set point alternately to the “St.bY”
messages and forces the control outputs to zero.
As we have seen, it is always possible to modify the value
assigned to a parameter independently from the operative
modes selected.
7.1 MODIFY A PARAMETER DURING
“OPERATOR LEVEL”
The instrument is showing the “standard display”.
1.
Press the
button.
2.
The upper display will show the acronym of the first
parameter promoted to this level while the lower display
will show its value.
3.
By
and
button assign to this parameter the
desired value.
4.
Press the
button in order to memorize the new value
and go to the next parameter.
5.
When you want to come back to the “standard display”
push the
button for more than 3 seconds.
Note:
The parameter modification of the Operator level
is subject to a time out. If no button is pressed for
more than 10 seconds, the instrument goes back to
the “standard display” and the new value of the last
selected parameter will be lost.
7.2 ENTER THE “LIMITED ACCESS LEVEL”
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
[118] PAS2 (Level 2 password).
Notes: 1.
The factory default password for configuration
parameters is equal to 20.
2.
All parameter modification are protected by a
time out. If no button is pressed for more than
10 second the instrument comes automatically
back to the Standard display, the new value of the
last selected parameter is lost and the parameter
