Interrupts - Siemens SIMATIC ET 200AL Manual

5.2

Interrupts

The AI 4xRTD/TC 4xM12 analog input module supports diagnostic and hardware interrupts.
Diagnostic interrupt
The table below shows the events for which the analog input module returns a diagnostic
interrupt, depending on the parameter assignment.
Table 5- 3
Measure-
ment type
Voltage
Resistance
Thermal
resistor
Thermocou-
ple
Hardware interrupt
The analog input module generates a hardware interrupt with the following events:
• Low limit 1 violated
• High limit 1 violated
• Low limit 2 violated
• High limit 2 violated
Detailed information on the event is available in the hardware interrupt organization block
with the instruction "RALRM" (Read additional interrupt information) and in the STEP 7 online
help.
The start information of the organization block includes information on which channel of the
analog input module triggered the hardware interrupt.
Note
High limit violation of 2 limits
If two limits are violated at the same time, limit 1 is always signaled first, followed by limit 2.
Analog input module AI 4xRTD/TC 4xM12 (6ES7144-5KD50-0BA0)
Equipment Manual, 08/2020, A5E48753535-AA
Diagnostic interrupts
Wire High limit
break violated
- x
x x
x x
x x
Diagnostics
Low limit Error
violated
signment
x x
- x
x x
x x
Interrupts/diagnostics alarms
5.2 Interrupts
Parame- Reference Hardware
ter as- channel interrupt
error lost
error
x -
x -
x -
x x
x
x
x
x
37