Alarms and events terms

Term

Description

EVENT_STATE

State of the Alarm/Event itself.

If the Alarm/Event is TRUE, then EVENT_STATE is TRUE and vice versa.

For more detailed information, see the Siemens Step7 documentation.

STATE

The state in general whether the Alarm/Event is available. Maybe a data block is deleted where a bit should be monitored.

ACK_STATE

The state of the acknowledgment of coming or going Alarms/Events.

For more detailed information, see the Siemens Step7 documentation.

TIME_STAMP

The timestamp of the Alarm/Event provided by the PLC.

NO_ADD_VALUES

The number of additional values sent with this Alarm/Event message.

ADD_VALUEw,DATA_TYPE

The data type of a specific additional value of an Alarm/Event.

ADD_VALUEw,LENGTH

The length of a specific additional value of an Alarm/Event.

<EV_ID>

The event ID created automatically by the Step7 programming software.

In case of Alarms (FB33 to FB36, SFC17/18/107/108), this is the EV_ID-parameter of the function block. The value of the parameter must be converted from hexadecimal to decimal, and then filled up with leading zeros to the length of 6 characters (for example: EV_ID: DW#16#4E25 => <EV_ID>: 020005).

In case of Events (generated by the symbol editor) this is the "Message number." This number is in decimal format and must be filled with leading zeros up to 6 characters (for example: "Message number": 20000 => <EV_ID>: 020000).