About InTouch Alarms Wonderware InTouch
Alarms represent warnings of process conditions that could cause problems and require an operator response. A typical alarm is triggered when a process value exceeds a user-defined limit, such as an analog value exceeding an upper threshold. This triggers an alarm to notify the operator of a problem.
After the operator acknowledges the alarm, the InTouch HMI recognizes the alarm has been acknowledged. You can configure the InTouch HMI to require an alarm to be acknowledged even if the condition causing the alarm has passed. This ensures that an operator is aware of events that caused a temporary alarm state but have returned to normal. The main alarm states are described in the following table:
| Alarm State | Condition |
|---|---|
| ACK | Alarm was acknowledged. |
| ALM | Alarm has occurred. |
| RTN | Tag returned from an alarm state to a normal state. |
InTouch Alarms
An event is a detectable occurrence of something happening within the system, which may or may not be associated with an alarm. A transition into or out of an alarmed state is one kind of event. An event might also be an operator action, a change to the system configuration, or some kind of system error.
An event is different than a condition. A condition can persist for minutes, hours, days, or weeks. An event is momentary; it takes place and is immediately over. An alarm is a condition; an alarm notification is an event.
Events represent normal system status messages and do not require an operator response.
When you define a tag to do event monitoring, you can choose to have event messages printed or logged to the alarm system each time the tag value changes. The event message includes how the value changed and whether the operator, I/O, scripts, or the system initiated the change.
An event can be one of the following types:
| Event | Condition |
|---|---|
| OPR | The operator modified the tag value using the Value input. |
| LGC | A quick script modified the tag value. |
| DDE | The tag value was poked from a DDE client. |
| SYS | A system event occurred. |
| USER | $Operator changed. |
The SYS and USER events are generated by the system regardless of whether event logging is enabled for any tags. DDE, OPR, and LGC events relate to tag values and are only generated for tags that have event logging enabled.
Related Topics
Types of InTouch Alarms
Within the InTouch HMI, alarms are classified into general categories based on their characteristics. These categories are known as Class and Type. The Distributed Alarm system categorizes all alarms into five general conditions: Discrete, Value, Deviation, Rate-of-Change, and SPC.
| Alarm Condition | Distributed Class | Distributed Type |
|---|---|---|
| Discrete | DSC | DSC |
| Value – LoLo | VALUE | LOLO |
| Value – Low | VALUE | LO |
| Value – High | VALUE | HI |
| Value – HiHi | VALUE | HIHI |
| Deviation – Major | DEV | MAJDEV |
| Deviation – Minor | DEV | MINDEV |
| Rate-of-Change | ROC | ROC |
| SPC | SPC | SPC |
You associate each InTouch tag with an alarm condition when you define the tag. Depending upon a tag’s type, you can define one or more of the alarm classes or types for it.
Alarm Queries Wonderware InTouch
Alarms and Events Window Popup Wonderware Intouch :-https://youtu.be/fHKgPYI8agA
Alarm queries follow this syntax for the local node:
Provider!AlarmGroup
For example:
InTouch!$System
Use the following query syntax for remote nodes:
\NodeNameProvider!AlarmGroup
For example:
\ProdSvrInTouch!$System
Use the following syntax for querying alarms from a Galaxy. This syntax gets alarms from a specific attribute of an object in a specific area on a specific computer.
\NodeNameGalaxy!Area.Object.Attribute
The following syntax gets all alarms from a specific area:
\Galaxy!Area
The following syntax gets alarms from two areas:
\Galaxy!Area1 \Galaxy!Area2
The following syntax gets all alarms from the Platform on computer node (by default):
\NodeNameGalaxy
You can also use a wildcard. The following syntax gets all alarms from Area1, Area2, Area3, and so on:
\Galaxy!Area*
The following syntax gets all alarms from all objects starting with the characters “Tank” in the area “Area”:
\Galaxy!Area.Tank*