BEA Multibeam Manuale Utente
Calculating the time of a cycle
Beams process time :
20.000ms
Transfer time of the frame to the MB at 9600 bps :
9.75ms
Waiting time between interrogation and answer :
1.50ms
Transfer time of the answer from the MB at 9600 bps :
13.54ms
Total time of a 9600 bps cycle :
44.8 ms
Beams process time :
20.000ms
Transfer time of the frame to the MB at 19200 bps :
4.69ms
Waiting time between interrogation and answer :
1.50ms
Transfer time of the answer from the MB at 19200 bps :
6.77ms
Total time of a 19200 bps cycle :
33 ms
2.2. Quick mode
It is a lightened communication mode adapted to a high speed use of the MULTIBEAM. The
configuration of this mode is the same as for the BUS mode, except that the controller interrogation
speed can vary from 26 ms to endless time without troubling the process of the module.
Byte structure for the quick mode Hexa:
start bit, 8 data bits and 1 stop bit, no parity.
Structure of the door controller frame to the MULTIBEAM
STX
header value 2
Address of the interrogated control box of 00H, 01H, 02H or 03H (depends of the position of the dip-
switches)
Checksum (STX + address) AND 127
ETX
End of frame value 3
Total : 4 bytes
Structure of the MULTIBEAM frame to the door controller
Structure of the MULTIBEAM frame to the door controller
STX
header value 2
Module Address of 00H, 01H, 02H or 03H (depends on the position of the dip-switches)
Byte1
8 bits that match with the first 8 beams (Bit on 1 = detection)
Byte2
8 bits that match with the last 8 beams (Bit on 1 = detection)
Checksum (STX + Address + Byte1 + Byte2) AND 127
ETX
End of frame value 3
Total : 6 bytes
The MSB of the checksum is on 1 if one of the receiving heads is shortcut. This function is not
available on BUS mode.
The working rhythm of the beams is independent of the communication.
Calculating the time of a cycle:
The MSB of the checksum is on 1 if one of the receiving heads is shortcut. This function is not
available on BUS mode.
The working rhythm of the beams is independent of the communication.
Calculating the time of a cycle:
Beams process time :
20.000ms
Transfer time of the frame to the MB at 9600 bps :
4.17ms
Waiting time between interrogation and answer :
1ms
Transfer time of the answer from the MB at 9600 bps :
6.25ms
Total time of a 9600 bps cycle :
31.42ms
Beams process time :
20.0ms
Transfer time of the frame to the MB at 19200 bps :
2.09ms
Waiting time between interrogation and answer :
1ms
Transfer time of the answer from the MB at 19200 bps:
3.125ms
Total time of a 19200 bps cycle :
26.215 ms
COMMUNICA –
TION STUCTURE
4
2
.0
5
6
7
/
V
1
–
0
1
/0
7
BEA S.A. - LIEGE Science Park – Allée des Noisetiers 5 – B-4031 Angleur - Tel: +3243616565 – Fax: +3243612858 – info@bea.be - www.bea.be