ALTER SM1150, Техническая заметка

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File: SM1150_r5eng - February 2007 - Technical note: SM1150
SM 1150
File: SM1150_r5eng - February 2007 - Technical note: SM 1150
page 9 of 29
SM 1150
Working Modes
The working capability of the SM1150x depends from its
“working status”: it has several statuses with different meaning
and functionality. The logic flow of these statuses is showed on
the bottom drawing.
These statuses (or modes)are:
POWER
-
ON
: it goes in this mode at power-on, when the main
breaker is set to 1: the CPU performs some controls, displays
the name of the unit (“1150”) then the software version (i.e.
“V2.01), and after few seconds, the unit enters in Stand-By
mode.
STAND
-
BY
it’s a waiting state, the unit is powered but not
ready as the magnetron filament is not powered; the display
shows “STBY”, all the working parameters can be setted from
Operator Panel; the unit enters in Stand-By from the previous
Power-On state or from a Reset state.
The unit exits from Stand-by and goes to Preheating only
if there aren’t alarms, the Interlock chain is closed and the
HIBERNATE command is OFF.
PREHEATING
it’s a temporary state, driven by a timer, to
allow the filament to be heated. The display shows “PREH”.
Entrance in this mode is done by an external command or self-
starting after the end of Power-On state. When the timer is
elapsed the unit goes in Ready mode.
READY
it’s a waiting state, the display shows “RDY”. The unit
waits the enabling command to generate power to the magne-
tron. The magnetron filament has been heated.
The unit may last in this state as long as needed: it exits auto-
matically in case of alarms or when the
”filament heating” command is removed. It goes to next “MW-
ON” when the enabling command is set ON.
MW
-
ON
starts microwave emission at the presetted power
level. The display shows alternatively the name of the choosen
unit (“CURRENT” or “%POWER” or “POWER” or..) and its
value, while the led “MW ON” is lighted up.
The unit exits from this mode in case of:
* the enabling command is set OFF: enters into Ready state, or
* ALARM presence: the unit goes to Stand-by, or
* the INTERLOCK chain is open: it goes to Stand-by again.
ALARM
in this mode the output power is immediately shut-off
as well as the filament.
The alarm type is showed on the display, alternatively with the
word “ALAR”.
The unit may exits from the Alarm mode, to enter into the
Reset Waiting mode, only when the alarm cause is removed.
RESET WAITING
: the unit enters in this mode when the alarm
cause is cancelled and the enabling command is still present
(ON).
The unit exits from this condition, and enter in Reset mode,
only when the enabling command is switched OFF.
RESET
: It’s a temporary state, driven by a two seconds
timer. When the timer is elapsed the Reset state end, and the
SM1150 enters automatically in Stand-By mode.
The working condition is indicated on the display.
Look at the diagram for the working mode logic.
Meaning of external command.
HIBERNATE: has value ON/OFF. If ON the magnetron’s
filament is not powered and the SM1150 goes into Stand-by
mode.
In OFF the unit makes filament heating and, when the related
timer is elapsed, enters in Ready mode.
If a user don’t like to use the Hibernate function, he may not
connect it: the system then detect it as in OFF condition.
POWER ENABLE: has value ON/OFF, but its effect is related
also with the Hibernate command as follow:
a) in OFF state -and HIBERNATE is OFF- the unit performs
filament preheating and goes in Ready mode but does not
generate output power, even if the reference signal is >0;
STAND-BY
PREHEATING
READY
MW-ON
Hibernate
OFF
Alarm
POWER
ENABLE=1
POWER
ENABLE=0
TIMER=0
TIMER>0
Hibernate
ON
Hibernate
ON
Alarm
POWER ENABLE=0
ALLARME
POWER
ENABLE=1
Alarm
Hibernate
ON
INTERLOCK=0
INTERLOCK=0
INTERLOCK=0
INTERLOCK=0