Imagine NEO DVR-3901, Инструкция по установке и эксплуатации

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48 DVR-3901 Installation and Operation Manual
Chapter 4: Remote Operation
CHECKSUM
The final byte in these commands is always a modulo-256 checksum.
This is the sum of all bytes of the command, not including the
checksum byte itself. This checksum byte is included in
Table 4-4 and
Table 4-5 for commands that do not contain variable data. For example,
the PLAY command consists of three bytes, 20 01 21. In this command,
the third byte, 21, is the checksum. For commands and responses that
contain variable data, the checksum byte is denoted in the table as uu.
Note
Only some motion commands
are described in this manual.
For the full list of commands
supported, please refer to the
DVR-3901 Automation Control
Developer’s Manual.
Table 4-2. Summary of CMD-1 Categories
CMD-1 (hex) Function Direction
0 System control To DVR-3901
1 System control response From DVR-3901
2 Transport control To DVR-3901
4 Preset and select control To DVR-3901
6 Sense request To DVR-3901
7 Sense response From DVR-3901
A Odetics “auto mode” extensions To DVR-3901
C NEO VR extensions Bidirectional
F NEO VR extensions Bidirectional