Omnivision OVR 2000, Руководство пользователя

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8. APPENDIX 1
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▒ Checksum is a value which is used for checking if the transmitted value is proper.
Checksum value will be calculated by each unique numerical formula.
Suppose that the left move command of P/T/Z camera A is ‘0x81’ and its ID is ‘0x01’.
And its checksum formula is ‘100 – (ITEM 1 + ITEM 2)’. Then the value for left command is as bellows.
[01 (Camera ID)]+ [81(‘0x’ must be removed.)]+ [100 – (01 + 81) (Checksum)] =01, 81,7e
(Each value should be separated by ‘, ‘.)
Refer to [1.5 Hexadecimal Numeration System] to calculate this in easy way.
8. Repeat step 7 until all the commands needed are filled.
When finished press the [ADD] to save the values.
9. When there is another P/T/Z camera to set up, choose a different Camera ID with the P/T/Z protocol.
And repeat step 6~8.
Press the [Modify] key to apply changed values.
10. To edit, select the model and change the value and press [Modify].
To delete the information, select the model and press [Delete].
11. When finished, press the [Exit] key to close the Open Protocol Window and select the P/T/Z protocol in
the Setup Screen.
ITEM 1 ITEM 2 ITEM 3
Camera ID Command Code Checksum*