User`s manual

MegaPlus ES 1020 User’s Manual
Redlake MASD, Inc. Page 12 91000134-001 Rev. A
5. Camera Operation
Factory Settings
The camera is configured at the factory with the following defaults:
• Free Run
• 2 Tap output
• 10 bit output
Negative Trigger Polarity
Implementation
Camera communication is accomplished via asynchronous serial communication according to EIA
Standard RS 232 C through the Camera Link cable.
Data rate: Full Duplex, 9800 bps.
• 1 START bit
• 8 DATA bits – The LSB (D0) is transferred first
• 1 STOP bit
• No parity
Protocol
The camera is controlled through command packets. The camera is considered a slave device and
never generates data without a read request. The data packet formatting is described in detail below.
NOTE: The checksum is calculated only on the 4 ascii characters comprising the Data.
Data Packets
1 ascii
character
2 ascii
characters
2 ascii
characters
2 ascii
characters
4 ascii
characters
2 ascii
characters
1 ascii
character
1 ascii
character
Start Command Target Index Data Check End Ack/Nack
Start
Indicates the Start of the frame
Size = 1 ascii character
Value = 123 Decimal (ascii { )
Command
Command descriptor
Size = 1 ascii character
Value = 114 Decimal (ascii r ) for Read
Value = 119 Decimal (ascii w ) for Write
Target
Command descriptor
Size = 2 ascii characters
Index
Command descriptor
Size = 2 ascii characters
Data
The data transferred
Size = 4 ascii characters