Creating Alarms With The "Program_Alarm" Instruction - Siemens SIMATIC S7-1500 Function Manual

6.1

Creating alarms with the "Program_Alarm" instruction

"Program_Alarm" instruction
You create a program alarm in STEP 7 with the "Program_Alarm" instruction.
The figure below shows the "Program_Alarm" instruction with the most important input tags.
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Figure 6-1
Diagnostics
Function Manual, 11/2019, A5E03735838-AF
The "Program_Alarm" instruction monitors the signal at the SIG block input and generates a
program alarm in case of a signal change at the SIG parameter. The instruction generates an
incoming alarm when the signal changes from 0 to 1 and an outgoing program alarm if the
signal changes from 1 to 0. The program alarm is triggered synchronously to program execu-
tion.
The time stamp is automatically created when the alarm event occurs in the automation system
and is passed along with the alarm.
You can append up to ten associated values to the program alarm at the parameters SD_i (1 ≤
i ≤10). The associated values are acquired at the time of the signal change at the SIG parame-
ter and assigned to the program alarm.
Associated values are used to display dynamic contents in alarms.
Example: The temperature in the tank <associated value 1> is <associated value 2> °C.
You can find more information on associated values in the STEP 7 online help.
"Program_Alarm" instruction
6.1 Creating alarms with the "Program_Alarm" instruction
Alarms
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