File: SG1024_r1eng - April 2017 - Technical note: SG 1024 page 7 of 16
PM 250
SG 1024
enters into “MW-ON” state and generates output power, when
the enabling command is removed (OFF) the unit comes back
to “READY” state
.
Working Modes
The behavior of the SG 1024 depends on its “working status”:
it has several statuses with different meaning and functiona-
lity. The logic flow of these statuses is showed on the next
power on:
when the unit is switched on, during the first two
seconds, the unit runs the bootloader, waiting for any serial
firmware update data. After that, if there are not alarms, the
unit goes in Ready status, otherwise it goes in Alarm status if
an alarm is present. It is a temporary status at Power On.
ready:
it’s a waiting state. The unit waits for the enabling
command to generate microwave.
The unit may last in this state as long as needed: it exits auto-
matically in case of alarm. It goes to next “MW-ON” status
when the enabling command is set ON and the reference
signal is > 1%
mw-on:
starts microwave emission at the presetted power
level.
The unit exits from this mode in case of:
* the enabling command is set OFF: enters into Ready state,
or
* the reference signal goes below the 1%: enters into Ready
state,
or
* ALARM presence: the unit goes to Alarm status
alarm:
when an alarm condition is present the unit will
remain in this status. The RF output is set OFF.
RESET of Alarm:
to exit from Alarm the Enabling command
must be set OFF for 2 seconds and the alarm condition should
be removed.
See Alarm Troubleshooting table at page 15 for the complete
alarm list and relative codes.
Note*: the last alarm occured is permanently stored
by the CPU , even in absence of main line, and can
be verified using the Front Panel software
The alarms are also coded with a number that is emitted on the
4 bit outputs provided on CONN #5 (see the relevant schema-
tic at page 12).
The following is the table with the indication of the codes.
Meaning of external commands.
LINE BREAKER 0-1: in pos. 1 the unit goes in POWER ON.
The line switch can be freely switched off at any time.
POWER SET: it’s an analog input value and has the meaning
of “desired percent” of the full output power (1000 W)
When this value is lower than 0.2 Vdc the unit does not gene-
rate any output power, when over that threshold it generates
microwave power proportional to this signal value (at the
condition Enable signal is ON).
The scaling is 100W/V. It can be controlled:
- by the knob located in the front panel during the manual
mode;
- via usb serial connector, with the dedicated software, in
remote mode;
- via fieldbus module in remote mode (for SG 1024 vers. 1
only);
- by an analog signal (0-10Vdc) on CONN #2 pin 5 (+), pin
18 (ground), using as voltage source pin 7 (+10 V)
Description
BIT 3
[22]
BIT 2
[ 9]
BIT 1
[21]
BIT 0
[ 8]
No Alarm
0
0
0
0
Overtemperature Alarm
0
0
0
1
Reverse Power Alarm
0
0
1
0
RF input signal (PLL) Alarm
0
0
1
1
AC/DC Power Supply Alarm
0
1
0
0
Overcurrent MOS stage
0
1
0
1
not imlemented
0
1
1
0
not implemented
0
1
1
1
not implemented
1
0
0
0
Interlock Alarm
1
0
0
1
Driver Alarm
1
0
1
0
Communication interrupted Alarm
1
0
1
1
not implemented
1
1
0
0
not implemented
1
1
0
1
not implemented
1
1
0
1
not implemented
1
1
0
1
Table of Alarm Codes
