![]() The following feature is new in Ignition version 8.1.2Ĭlick here to check out the other new features More details on such errors are usually sent to a console somewhere, such as the Gateway's console. For example, a query on a query tag couldn't execute, but the Tag doesn't know why. There is a problem with the value, and the problem was completely unexpected. For example, the trial expired or read access was explicitly denied. There's a problem with the value, but it's an "expected" or well recognized type of the problem is. These are generally used when the system hasn't received a new value in a timely manner. Generally represents a value that was good, but the reliability is somewhat questionable. The value is generally considered reliable. Note that not every value within a range has a code: the space is there for future codes to be added. Quality codes are broken up into several ranges. The following tables outline the primary data qualities. This StatusCode is converted to its Qualitycode equivalent, while the write value is passed to the Tag system as a QualifiedValue.Įach quality code has a range of subcodes that provide more specific information about the value of the Tag. Note: OPC UA clients are now allowed to write to exposed Tags, which include a StatusCode. Each module has its own Tag Quality Code Reference Table displaying the error codes and what they mean. The sections below describe in detail Perspective and Vision overlays. Vision and Perspective overlay systems are similar, but each look a little bit different. What is cool about component overlays is that they not only tell you that there is a problem, but they also help diagnose the problem. The different overlays can mean different things, denoting their underlying cause. What they indicate is based on the Quality properties of Tags.Ĭomponent overlays appear in the Designer workspace, Perspective Session, and Vision Client to let designers and operators know when there is a problem with one of the bindings on a component. ![]() If any of these qualities becomes poor, the Perspective or Vision component will show an overlay. Each data binding that drives a component is evaluated for quality. ![]() In a highly distributed system like Ignition, it is especially important as the client may be located at quite a distance (maybe across the world) from the physical process it is monitoring and controlling.įor these reasons, Perspective and Vision components display visual overlays for various reasons to indicate that the data they are displaying is not good, or pending a reply from the device. HMI screens allow users to quickly gauge the health and accuracy of what is displayed at a glance. ![]()
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