User's Manual

RFID Base Station
3.1.4 Reading photocell tube
The photocell tube is read constantly and prepares the flag to confirm the presence of the tube on
the pallet (PASSFULL).
If the signal of the photocell tube is active but photocell of the pallet is off, then it sends a first message
of unexpected tube (UNEXPECTED_TUBE). If by the time fotTubeFlt you have repeated signals, then
the message of light interference on the photocell (TOO_MUCH_UNXP_TUBE) is sent.
3.1.5 Gate Management
The gate’s electrovalve is activated in case of:
1. homeMot signal = 0 (the engine is performing the homing)
2. receiving a command of EMERGENCY_GATE_OUT
3. receiving a command of HOME_GATE (2s ahead of the start homing)
The solenoid valve is turned off:
1. homeMot signal = 1 (is not performing a homing)
2. receiving a command of EMERGENCY_GATE_IN
Throughout the time of gate EV activation the timer skipCnt is preset with the skipTmr value. The timer
begins to countdown when the solenoid is off. This timer prevents any deviation that would produce
the error PALLET_TOO_SLOW .
3.1.6 Engine Management
The motor board MOH
When the board motor turn on, it runs automatically the homing research and resulting in a position
aligned to the track. In this phase the signal homeMot is held at 0. Just finished zeroing, the homeMot
goes to 1.
The RFID board MOL
When the RFID is turn on it sets the state variable homeMotStt to HM_BOOTUP, starts the verification
process of homing and then goes into HM_WF_BOOTUP. In this state, it waits for the reset of the card
by toggling the motor signal startMot, every homeMotTmo. After 10 inversions (5 attempts homing)
without receiving answers from the card engine, says that the communication between the two
boards is not working by sending the error message COMM_MOT_FAULT.
In the state HM_READY the system observes the signal homeMot = 0 to send the error HOMING. Then
it goes into the HM_WF_TMO state waiting for homing (homeMot = 1). If this does not happen within
the time homeMotTmo the error HOMING_TIMEOUT is sent. If the homing finish properly it send a null
message (all 0).
20 Sirius Electronic Systems s.r.l.