Maxtor NVR-2028 사용자 설명서

APPENDIX 2. –RS-232 Protocol

1. Setup

1.1 Use a Null Modem cable (the standard RS-232 9 Pin Cable with Pin 2 and Pin 3

exchanged, see pin configuration chart below for details) to connect the COM 1 on the rear
panel of the NVR-2028 to a PC.

NVR

1.2 Set the RS-232 option to ON in the COMMUNICATION page of the setup menu.

1.3 Set the PC communication parameters: 9600 bps, No Parity, 8 Data Bits, 1 Stop Bit.

2. Communication Protocol

2.1 General Command Format
<Lead Code = 0x41>, < Dest ID >, < Src ID >, <Main category >, <Second category >,
{<Number of parameters>,<Parameter 1>, <Parameter 2> ..,} <End Code= 0x4f>

Lead Code = 0x41

Dest ID = 0x01
Src ID = 0x20

Main Category = 0x01 Keys and Signals

= 0x02 Command

Second Category = 0x01 Handshake

= 0x02 Request Time/Set Time

= 0x06 Request System State

= 0x0b Time Search

End Code= 0x4f

The different command types and their corresponding parameters are as follows:

2.2 Keys and signals

PC Send: <0x41>, <0x01>, <0x20>, <0x01>, <Key Value(Low byte)>,