Norwood, MA-November 15, 2008- The Video Historian extension for Longwatch's Video Surveillance System enables users to acquire and store video clips linked with process and manufacturing variables such as time of day, camera number, batch step, machine ID and other control system tags. Much like a process historian that stores information about processes, the Video Historian archives video that documents procedures in batch applications, provides visual proof of regulatory compliance, monitors machinery, observes operator actions, and helps improve quality, reduce downtime and avoid costly losses.
The Video Historian module can be added to any Longwatch Video Surveillance System via a simple download. The Longwatch Video System includes Video Control Center and in-plant or remote Video Engine software to manage multiple cameras. The Video Engines acquire and store high-definition video images and provide video clips documenting defined events. Multiple Video Engines interface to the Video Control Center through the plant's Ethernet or control network (wired or wireless), delivering "video clips" generated by the Video Engines to HMI/SCADA workstations, Internet browsers or mobile phones.
Standard Longwatch Video Surveillance software allows video clips to be viewed on a plant's control system HMI/SCADA screens, or sent to web browsers or cell phones. The Video Historian module allows video clips to be archived, along with relevant process variables. This enables users to access video records of events, activities and trends in a similar way they currently access historical data. Correlating video with process/manufacturing events can greatly expand the user's ability to manage their operations.
Configuring the Historian
Users can specify the length of video clips, attach real-time data to the video, and coordinate video data with external SQL data bases. Users can command a camera to start, pause, stop, pan and zoom based on external inputs, conditions detected in the camera image, or commands from a process control system. For example, a video clip can be commanded during a batch step to record an operator's actions when adding ingredients to a reactor. The video clip can be stored by the historian with time of day, camera number, recipe number and batch step number. If a problem comes up later with the batch, the video clip can be reviewed to ensure that the step was performed correctly.
The Longwatch Video Engine software, which controls each camera, is capable of detecting significant changes in the image, such as an intruder, vehicle or object entering the field of view. A video clip is created automatically whenever such an event occurs, or when triggered by a PLC or operator command.. Such abnormalities can trigger an alarm, and cause the video clip (of video before, during and after the event) to be sent to the Video Historian. An operator, alerted by the alarm, can switch to live video for further review and decision-making.
The Video Historian interfaces with almost all HMI/SCADA systems, enabling users to configure, control and view videos directly on an HMI screen. Commands to archive video data can also be entered into an ISA88 batch recipe using OPC commands or other scripts.