videotronic HQ-IDC-23012P, Operating Instructions Manual

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Annex
56
HQ−IDC−23012P
Order No. M578527AC/112003
© 2003 videotronic gmbh
ALL RIGHTS RESERVED
4.7.2.2 Communication flow
Note: A communicative flow is shown in Fig. 72*.
A controller transmits <1> ENQ for a
connection check. Please carry out and
receive
<2> ACK from a camera * (A
connection check is omissible).
A controller transmits <3> Command
sequence to a camera. A camera is it <4>
ACK to receive Command sequence. A
letter is answered and <5> response
sequence to Command sequence is
transmitted further. A controller is
Response
sequence. If it receives, please
transmit <6> ACK to a camera. Any
further communication are repeat form
step
<3 − 6> .
*RS−485 correspondence
Since it corresponds to the composition
(one to more), which connects two or
more cameras to one controller, ID is
added.
Fig. 72 Communication flow
Controller 23X Auto−focus camera
1
2
3
4
5
6
ENQ (05h)
ACK (06h)
Command sequence
ACK (06h)
Response sequence
ACK (06h)
Fig. 73 Serial communicatin parameter
Table 1
Transmission
speed
Data length
Parity
Stop bit
Flow control
Form
9600 kbps
8 bit
Nothing
1
Nothing
Synchronous formula
Serial communication parameter