Mapping I/O Signals: MVS-8600 DualLVDS ConfigurationCognex VisionPro

The MVS-8600 DualLVDS configuration, which corresponds to Configuration 3 described in the section Loadable Software I/O Configurations of the MVS-8600 Hardware Manual, lets you use two line scan cameras, both using LVDS encoders.

Note: This configuration is not available on the MVS-8601.

VisionPro reads the MVS-8600 I/O configuration from the VisionPro.ini file in the Windows or WINNT directory. To use the DualLVDS configuration for your MVS-8600 series frame grabbers, make sure these lines appear in VisionPro.ini:

[CogFrameGrabber8600 #0]
IOConfig = DualLVDS
Physical Connections

The following picture shows an MVS-8600 frame grabber.

Framework PhysicalIO Walkthrough 8600 DualLVDS 8600overview

The Hirose HR10 connector at P3 connects to an I/O Connection Module (part number 800-5885-1) which provides you with screw terminals to connect to tiggers, strobes, and encoder devices.

Framework PhysicalIO Walkthrough 8600 DualLVDS connectionmodule 6800

Each configuration uses a different cable to connect the Hirose HR10 connector to the I/O Connection Module. For the DualLVDS configuration, you must use cable part number 300-0538.

The P4 and P6 connectors on the MVS-8600 connect to your computer's back plane with one or two I/O extension cables (part number 300-0240) which provides you with DB-25 connectors that give you access to other I/O lines as well as some of the same signals that the HR10 connector provides.

Framework PhysicalIO Walkthrough 8600 DualLVDS extensioncable 86

Mapping the Programmable Input Lines

In the DualLVDS configuration, the MVS-8602 provides 6 programmable input lines. Three lines come from the P4 connector, and the other Three come from the P6 connector.

In the following table, the positive pin is given first, then the negative. For example, "3 (+) and 4 (-)" means that pin3 is positive, and pin 4 is negative.

Table 1. DualLVDS Input Line Mapping
Software Input LineSignal NameP4’s 300-0240 Pins on DB-25P6’s 300-0240 Pins on DB-25
0Not available in DualLVDS configuration
1Not available in DualLVDS configuration
2OPTO_IN_2±11 (+) and 12 (-)
3OPTO_IN_3±11 (+) and 13 (-)
4OPTO_IN_4±3 (+) and 4 (-)
5OPTO_IN_5±3 (+) and 5 (-)
6OPTO_IN_6±11 (+) and 12 (-)
7OPTO_IN_7±11 (+) and 13 (-)
Mapping the Programmable Output Lines

In the DualLVDS configuration, the MVS-8600 provides 8 programmable output lines. Four lines come from the P4 connector, and the other four come from the P6 connector.

In the following table, the positive pin is given first, then the negative. For example, "3 (+) and 4 (-)" means that pin3 is positive, and pin 4 is negative.

Table 2. DualLVDS Output Line Mapping
Software Output LineSignal NameP4’s 300-0240 Pin on DB-25P6’s 300-0240 Pin on DB-25
0Not available in DualLVDS configuration
1Not available in DualLVDS configuration
2OPTO_OUT_2±9 (+) and 10 (-)
3OPTO_OUT_3±22 (+) and/ 23 (-)
4OPTO_OUT_4±15 (+) and / 16 (-)
5OPTO_OUT_5±1 (+) and 2 (-)
6OPTO_OUT_6±9 (+) and 10 (-)
7OPTO_OUT_7±22 (+) and 23 (-)
Connecting Devices to the I/O Connection Module

Triggers, strobes, and encoder outputs are available through the I/O Connection Module. Some of the signals from the I/O Connection Module are also duplicated in the P4 and P6 connectors.

Framework PhysicalIO Walkthrough 8600 DualLVDS connectionmodulelayout

In the DualLVDS configuration, the trigger and strobe connections are opto-isolated.

Table 3. DualLVDS I/O Module
SignalDescriptionReplicated on ...
S0+Strobe for camera port 0P4, DB-25 pin 15
S0-Strobe for camera port 0P4, DB-25 pin 16
T0+Trigger for camera port 0P4, DB-25 pin 3
T0-Trigger for camera port 0P4, DB-25 pin 4
S1+Strobe for camera port 1P4 DB-25 pin 1
S1-Strobe for camera port 1P4 DB-25 pin 2
T1+Trigger for camera port 1P4, DB-25 pin 3
T1-Trigger for camera port 1P4, DB-25 pin 5
A0+LVDS encoder camera port 0P4, DB-25 pin 6
A0-LVDS encoder camera port 0P4, DB-25 pin 7
B0+LVDS encoder camera port 0P4, DB-25 pin 20
B0-LVDS encoder camera port 0P4, DB-25 pin 25
A1+LVDS encoder camera port 1P6, DB-25 pin 6
A1-LVDS encoder camera port 1P6, DB-25 pin 7
B1+LVDS encoder camera port 1P6, DB-25 pin 20
B1-LVDS encoder camera port 1P6, DB-25 pin 25