JVC rs-840UD User Manual download pdf (Page 61)

A14

Controlling the Multiple Product

RS-232C

RJ-45

Header (5 bytes) Payload (4 bytes)

Checksum

(1byte)

command

Prex code

Set

Payload

Type

# of

payload

bytes

Command data #0 data #1 data #2 CS #0

Ack Set Wide

Mode

0xCC 0x55 0 4 0xC2 0xE0 : OK

0xE1 : NG

reserved (0xFF) reserved

(0xFF)

Header XOR

Payload

Read Wide

Mode

0xCC 0x33 1 4 0xC2 reserved (0x00) reserved (0x00) reserved

(0x00)

Header XOR

Payload

Ack Read

Wide Mode

0xCC 0x55 1 4 0xC2 0xE0 : OK

0xE1 : NG

0 : Normal/Full

1 : Wide

2 : Zoom

3 : Stretch/

Panoramic

reserved

(0x00)

Header XOR

Payload

Set Video

System

0xCC 0x33 0 4 0xCC 0 : 60Hz

1 : 50Hz

reserved (0xFF) reserved

(0xFF)

Header XOR

Payload

Ack Set Video

System

0xCC 0x55 0 4 0xCC 0xE0 : OK

0xE1 : NG

reserved (0xFF) reserved

(0xFF)

Header XOR

Payload

Read Video

System

0xCC 0x33 1 4 0xCC reserved (0x00) reserved (0x00) reserved

(0x00)

Header XOR

Payload

Ack Read

Video System

0xCC 0x55 1 4 0xCC 0xE0 : OK

0xE1 : NG

0 : 60Hz

1 : 50Hz

reserved

(0xFF)

Header XOR

Payload

RS232C CheckSum

Header (5 bytes) Payload (4 bytes)

Checksum

(1byte)

command

Prex code

Set

Payload

Type

# of payload

bytes

Command data #0 data #1 data #2 CS #0

Set Power 0xCC 0x33 0 4 0x10 "0 : 0ff

1 : On"

reserved

(0x00)

reserved

(0x00)

Header XOR

Payload

We can make CheckSum with Header (5 bytes) and Payload(4 bytes).

(Prex code#0) XOR (Prex code#1) XOR (Set ID) XOR (Command Payload Type) XOR

(# of Payload bytes) XOR (Command) XOR (data #0) XOR (data #1) XOR (data#2) =

CheckSum

For example:

(0xCC) XOR (0x33) XOR (0x01 = Set ID) XOR (0x00) XOR (0x04) XOR (0x10) XOR (0x01 =

ON) XOR (0x00) XOR (0x00) = 0xEB

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JVC rs-840UD User Manual Page 61

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