page 10
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File: SM1150_r5eng - February 2007 - Technical note: SM1150
SM 1150
File: SM1150_r5eng - February 2007 - Technical note: SM 1150
page 11
of 29
SM 1150
b) in OFF state -and HIBERNATE is ON- the unit is in Stand-
by mode but does not generate output power, even if the
reference signal is >0;
c) in ON state -and HIBERNATE is OFF- the unit waits the
end of preheating timer, if not yet elapsed, then starts to gene-
rate output power;
d) in ON state -and HIBERNATE is ON- the unit is in Stand-
by mode but does not generate output power, even if the
reference signal is >0.
POWER SET: it’s an analog input value and has the meaning
of “percent” of the output power.
When this value is lower than 9% of full value the unit does
not generate any output power, when >9% the unit generate
power proportional to signal value.
The signal can be 0-10V, 0-5V, 0-20mA depending on hard-
ware setting of internal jumpers located on the CPU board
(look at the related drawing to find them).
The output power can also be considered:
a) linear to the anodic current generated, or
b) linear to electrical output power (V * I), or
c) linear to forward r.f. power when the related feedback signal
is available from the process cavity.
INTERLOCK: has value ON/OFF. When in ON state the serie
of the hardware safety contacts is closed and the CPU light-up
the related Interlock OK led; in OFF state the led is Off and the
unit goes in Stand-by.
User Interface
At power on the 4 characters display shows the name of the
unit (“1150”) then the software version (i.e. “V100), and after
few seconds, the unit may enter in the working mode the unit
had at Power-Off only if the related parameter is set in this
way, otherwise the unit enters in Stand-By mode.
The unit, throu the display, informs the user of its working
mode displaying the abbreviations SBY or RDY or PREH.
At the end of the temporary filament preheating cycle (PREH),
the unit enters into the mode set by user and gives the fol-
lowing informations:
Control Mode: the parameter to be displayed (Power or Cur-
rent or Voltage or...) and the parameter’s name.
The parameter can be set throu the parameters table, position
zero.
Alarm Mode: type of alarm, alternating its name (lock at the
alarms list) and the word “ALAR”.
Programming Mode: depending on the selected level (look at
the next par.) may be displayed the Parameters Name or the
Parameter: in the latter case it may be possible to modify the
value using the digital potentiometer.
Buttons meaning
To enter on Programming mode press
ESC
button, then with
TAB
button (the button with the
arrow
) it is possible to run
over all the parameters and with the ESC button, or after a
period of 10 seconds idle, you may exit from Programming.
When you are set on a Parameter with the
ENTER
button you
go to second level and view its value (numeric or alfanume-
ric).
This value can be modified by the
potentiometer
(which is a
digital encoder), but the new value is stored only pressing the
ENTER button once again.
When positioned at second level, pressing the ESC button will
bring you to upper level without saving any variation.
Look at the next drawing about the “Control menu configura-
tion”.
Summary of Contents for SM1150
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