Ascon Tecnologic - KM5P Line - ENGINEERING MANUAL - PAG. 21
7 OPERATIVE MODES
As we said at paragraph 5.1, when the instrument is
powered, it starts immediately working in accordance to the
stored 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 upper display shows the measured
value while the lower display shows the power output, the
MAN LED is ON and the instrument allows to set manually
the control output power.
No Automatic action will be made.
–
In
Stand by
mode the instrument operates as an indicator.
It shows on the upper display the measured value and on
the lower display the set point alternately to the “St.bY”
message 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
mode selected.
7.1 Modify a parameter during
“Operator level”
Preliminary note
: The parameters available at operator
level (but also at limited access level) are divided into
two parameter “families”: Standard parameters (
par
)and
programs parameters(
prog
).
The standard parameters family is a list and includes the
parameters usually present in a standard controller (e.g. Set
point, alarm threshold, Proportional band, etc.).
Programs parameters are divided into groups (PrG, Pr1, Pr2,
Pr3 and Pr4). The first one (PrG) includes the parameters
necessary to manage the program running (or to select the
program to run), while the other includes all editing parameters
related with a specific program (Pr1 for program 1, etc.).
When the operator desires to edit a parameter, the
instrument asks to select the “family” to be displayed (
UiS
)
and then to choose the parameter.
The instrument is showing the “standard display”.
1.
Press the
button.
2.
The upper display shows
UiS
while the lower displays
par
.
3.
By
and
buttons select
par
.
4.
Press the
button.
5.
The upper display shows the acronym of the first
parameter promoted to this level while the lower display
shows its value.
6.
By
and
buttons assign to this parameter the
desired value.
7.
Press the
button in order to store the new value and
go to the next parameter.
8.
To return to the “standard display” push the
button for
more than 5 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 returns 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 5 seconds;
2.
The upper display shows
PASS
while the lower
0
;
3.
By
and
buttons set the value assigned to
[86] PAS2 (Level 2 password).
4.
The upper display shows
UiS
while the lower displays
par
.
5.
By
and
buttons select
par
.
6.
Press the
button.
7.
The upper display will show the acronym of the first
parameter promoted to this level while the lower display
will show its value.
Notes: 1.
The factory default password for configuration
parameters is equal to 20.
2.
Parameter modifications are protected by a time
out. If no button is pressed for more than 10 s the
instrument returns automatically to the Standard
display, the new value of the last selected
parameter is lost and the parameter modification
procedure is closed.
To remove the time out (e.g. the first time an
instrument is configured), 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 configuration procedure (see below).
3.
During parameter modification the instrument
continues to perform the control.
In certain conditions (
e.g. when a parameter
change produces a heavy bump to the process)
it is advisable to temporarily stop the control
procedure during the programming session (the
control output will be Off).
A password equal to
2000 + the programmed value (e.g. 2000 + 20 =
2020) switches to off the control output during the
configuration procedure. The control automatically
restarts when the parameter modification
procedure will be manually ended.
7.3 How to see but not modify the
“limited access parameters”
Sometimes it is necessary to give to the operator the possibility
to see the value assigned to the parameter promoted in the
Limited Access level but it is important that all changes are
made by authorized personnel only.
In this cases, proceed as follows:
1.
Press the
button for more than 5 seconds;
2.
The upper display will show
PASS
while the lower display
will show
0
;
3.
By
and
buttons set the value
-181
;
4.
Push
button;
5.
The upper display will show the acronym of the first
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 the parameters present in level 2 but the values
cannot be modified;
7.
It is possible to return to the “standard display” pushing
the
button for more than 3 seconds or by pushing no
buttons for more than 10 seconds.
