COMMUNICA– TION STUCTURE
42.0567 / V1 – 01/07
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
STX | header value 2 |
Module Address of 00H, 01H, 02H or 03H (depends on the position of the
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: |
|
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 |
BEA S.A. - LIEGE Science Park – Allée des Noisetiers 5 –
