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- Study of the electric schematics
REQUIREMENTS DEFINITION
PS001
The principal supply of master ECU (SPU 70-66) is always powered with a permanent 12 V (12VP). The
ECU handles its start and stop sequence with an internal control.
The start sequence is controlled when wake-up input is powered :
• --> WUI1 = ON
The stop sequence is controlled when :
• Wake-up input is in low state ( ON/OFF key, emergency stopper) : WUI1 = OFF.
• No EEPROM request pending (no write or read request) : EEPROM = NOREQUEST.
• Engine not in immobilizing state : CTRL[Engine]≠STOP.
Wake-up input WUI1 is provided by the ON/OFF key and depends on the state of emergency stoppers
and overriding switch :
• When the upper control box's emergency stopper is pushed and overriding switch SA801 is not
activated, the wake-up input WUI1 is seen as OFF.
• When the lower control box's emergency stopper is pushed, the wake-up input WUI1 is seen as OFF.
• When ON/OFF key SA901 is on OFF position, the wake-up input WUI1 is seen as OFF.
PS002
The machine is powered on by switching the ON/OFF key SA900 to ON position : KMG relay is closed
the the following signals raise to battery voltage :
• WUI1 : Wake-up signal for SPU controller, power line for sensors.
• 12VD1 : ECU outputs' supply rail.
• 12VD2 : ECU outputs' supply rail.
• 12VD4 : ECU outputs' supply rail.
• 12VD5 : ECU outputs' supply rail.
• 12VF1 : ECU outputs' supply rail.
• 12VF2 : ECU outputs' supply rail.
• 12VF3 : ECU outputs' supply rail.
• 12VF4 : ECU outputs' supply rail.
• Node B2 controller supply (platform slave, via KMP and FU7 fuse).
• Sensors' supply voltage (via KMP and FU7 fuse).
• Engine's relays supply voltage (via KMP and FU7 fuse).
• Actuators' supply voltage (Ground).
PS003 When the SPU controller is powered on, and its status is OK, the status LED blinks (1s ON/1s OFF).
PS004
At each power on, a check between the current software identifier and the EEPROM saved software
identifier is made, should the identifiers be different, the default value for all settings are reloaded :
• SPEEDS/RAMPS/OPTIONS/MACHINE CONFIG, failure F12.05.
• Overload system values, failure F06.01.
• Hours counter is forced to null value (0).
PS005 When the emergency stoppers (turret and platform) are pulled : EMSTOP=ON (12V).
PS006 When one at least of the emergency stops (turret and/or platform) is pushed : EMSTOP=OFF (0V).
PS006
To secure the stuck of KMP power relay, the power supply of outputs' supply rail is monitored. In case of
an emergency, stopper is pushed and the output's supply is still on for 2s, a failure is activated.
D2s(EMSTOP=OFF & (12VD1 > 8V | 12VD2 > 8V | 12VD3 > 8V | 12VD4 > 8V | 12VD5 > 8V | 12VF1 > 8V
| 12VF2 > 8V | 12VF3 > 8V | 12VF4 > 8V) --> F02.04(A)=1.
PS007
The overriding switch SA801 allows to bypass electrically the state of the upper control box emergency
stop and then to put power back to following power supplies : WUI1, 12VD1, 12VD2, 12VD3, 12VD4,
12VD5, 12VF1, 12VF2, 12VF3, 12VF4.
PS008 The 5V sensor supply is activated at machine's start-up until power is on.
PS009
The state of 5V sensor supply output is checked. In case of failure, F08.05 failure is activated with detail
code "00001".
PS010
The state of platform box emergency stop is available through SB802 input (connected to U104 platform
ECU) to activate the overriding mode.
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