Siemens SIMATIC Equipment Manual

Interrupts/diagnostics alarms
5.3 Alarms
I/O device digital inputs DI 16x24VDC M12-L 8xM12 (6ES7141-6BH00-0BB0)
28 Equipment Manual, 06/2021, A5E46570510-AB
5.3.2 Maintenance events
Triggering of a maintenance event
The PROFINET interfaces of the ET 200eco PN M12-L support the diagnostic concept and
maintenance concept in PROFINET according to the IEC 61158-6-10 standard. The goal is to
detect and remove potential problems as soon as possible.
The I/O device signals a maintenance event to the higher-level diagnostic system on the
following event:
Table 5- 5 Triggering of a maintenance event
Maintenance alarm
Error code
Event
Meaning
Maintenance demanded
MT/IO LED is lit
2
H
Undervoltage
Supply voltage 1L+ is below the tolerance limit.
System alarms in STEP 7
The maintenance information is generated in STEP 7 with the following system alarms:
• Maintenance demanded - indicated for each port by a yellow wrench icon
in the
device view or in the hardware configuration.
You can find additional information in the STEP 7 online help.

Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)