OMRON FH/FHV series visual sensor controller

OMRON FH/FHV Vision System: Practical Guide to Efficient Configuration and Troubleshooting

In the field of industrial visual inspection, Omron FH/FHV series visual sensors have become the core inspection equipment for many automated production lines due to their high-speed processing, flexible system configuration, and powerful image analysis capabilities. However, facing complex on-site environments and changing production demands, engineers often encounter challenges such as communication settings, multi camera synchronization, parallel processing optimization, and image log analysis. This article combines practical applications of the FH/FHV series to provide a complete solution from system startup to advanced feature optimization, helping you quickly locate problems and improve detection efficiency.

System startup and basic configuration: avoid common "pitfalls"

1. First launch language selection and communication module settings

When the FH/FHV series is powered on for the first time, a language selection dialog box will automatically pop up. If skipped or selected incorrectly, you can reset it later by going to Tool → System settings → Startup → Startup settings → Language Setting. Please note that the system will automatically restart after the language is changed.

The selection of communication modules directly affects the efficiency of interaction with peripherals. In the Communication tab of the Startup setting, the following interfaces can be configured:

Serial (Ethernet): Supports Normal (UDP/TCP), PLC Link (compatible with SYSMAC, MELSEC, etc.)

Serial (RS-232C/422): Supports Normal and PLC Link

Parallel: Standard Parallel I/O

Fieldbus：EtherCAT、EtherNet/IP、PROFINET

Remote Operation: Allow PC remote control after activation

Key tip: Do not set both Serial (Ethernet) and Fieldbus as PLC Link at the same time, otherwise communication conflicts may occur. If using a touch screen (FH-MT12), the corresponding item must be selected in Serial (RS-232C/422), and the connection order is strictly limited (connect cable first → start touch screen → start controller).

2. Operation mode selection - match production line rhythm

FH/FHV provides four operating modes, which need to be selected according to the application scenario:

Standard mode: Single task measurement, suitable for routine testing.

Double Speed Multi input mode: With the multi input function, it allows for immediate reception of the next trigger signal after image input is completed, achieving high-speed continuous measurement. Suitable for scenarios with extremely short takt times.

Non stop adjustment mode: While the production line is running, the measurement process parameters are adjusted in the background for zero downtime optimization.

Multi line random trigger mode: A controller can support up to 8 independent detection lines, each of which can be assigned different cameras and scenes. Very suitable for parallel detection of multiple workstations.

Engineering experience: When using multi line mode, it is necessary to allocate the corresponding relationship between the camera and the line in the Camera settings, and the background color of each line should be different for differentiation. Parallel I/O signals (STEP, BUSY, OR, etc.) will be automatically mapped according to the number of lines, and the more lines there are, the fewer available I/O points.

The correct usage of multi input function and high-speed triggering

1. Multi input principle

In traditional visual systems, it is necessary to wait for the entire measurement process to be completed before accepting the next trigger. The multi input function of FH/FHV divides image input processing into "camera side processing" (exposure+image transmission) and "controller side processing" (image conversion+measurement). After the camera side processing is completed, the READY signal immediately turns on, allowing the next STEP signal to enter, thus achieving a "pipeline" parallel operation.

This function is only applicable to parallel interfaces or EtherCAT communication, and requires only one camera input processing unit in the measurement process. If multiple camera inputs or HDR mode are used, the multi input function will automatically fail.

2. Trigger Delay Setting (Inter camera Setting)

In multi camera systems, in order to avoid light interference with each other, an "Exposure start additive time" can be set. Unit 30 µ s, range -4~511. Positive values delay exposure, negative values advance exposure (caution should be exercised). At the same time, the transmission speed can be adjusted (Standard/High speed), and the high-speed mode requires the camera cable to be ≤ 5m.

Fault case: When the READY signal is OFF and STEP is input, the ERROR signal will be output. Solution: Check if the STEP signal filtering width (default 80 µ s) is too long or if noise is causing false triggering. Increasing the filtering value appropriately (such as 176 µ s) in System settings → Other → STEP settings can suppress jitter.

Parallel Processing: Maximizing the Potential of Multi Core CPUs

1. Automatic parallelization vs manual parallelization