using banner vision products with ocs controllers ken jannotta jr. horner apg august 2007

Using Banner Vision Products with OCS Controllers

Ken Jannotta Jr.

Horner APG

August 2007

Design Goals

• Use logic and I/O from the OCS to control the vision sampling.

• Display the vision samples on the OCS screen.

• Save photos of failed parts to the compact flash on the OCS.

• Minimize wiring in the system.

Connections

Ethernet

Ethernet Switch

Video out from camera to VIM on

OCS

Communications

• Programming and monitoring from the PC to the OCS is performed using CsCAN TCP.

• Communication from the OCS to the Vision sensor is performed with Modbus TCP. (OCS is the master.)

• Communication from the PC to the vision sensor uses a proprietary protocol from Banner.

Communications

• Banner Setup

Communications

• Banner Setup

Communications

• OCS Setup

Communications

Video SetupFor image format use JPG for smaller file size.

File size = 40KCapture time = 5 seconds

Use BMP for more captured detail or faster captures

File size = 600KCapture time = 2 seconds

Capturing Video

• To capture video set the bit setup to capture the desired channel.

• Additional logic can be added to record missed captures. The capture bit is reset by the firmware when a capture is complete.

Parameters Available from the Banner Unit

• Trigger, teach product change…bits– Some bits have ack

• Pass/Fail bits and counts

• I/O status, error information

• Bar code handling information

• Location information

Performance Considerations

• Event trigger to capture2 Scans + < 100mS (Modbus rate)

Use input on camera for higher speeds

• Video capture performance

1 scan + 1 frame (33ms @ 60 hz)

Graphic Overlays

• There is an un-documented featured shown in the OCS demo that allows overlaying bitmaps on video with transparent sections.

Special color that is transparent on videoRed = 16Green = 0Blue = 0

All other colors are opaque