PRTG Manual: SIMATIC S7-300/400 LED Status Sensor
The SIMATIC S7-300/400 LED Status sensor monitors the physical LEDs on the front panel of a SIMATIC S7-300 or S7-400 Programmable Logic Controller (PLC) via the S7 protocol.
This sensor is in beta status. The operating methods and the available settings are still subject to change. Do not expect that all functions work properly, or that this sensor works as expected at all.
SIMATIC S7-300/400 LED Status Sensor
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
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Consider the following remarks and requirements for this sensor:
Requirement |
Description |
|---|---|
This sensor requires that the Beta Sensors experimental feature is enabled.
|
|
Credentials |
This sensor requires connection settings for Siemens S7 in settings that are higher in the object hierarchy. |
Parent device |
This sensor requires that the parent device is a Siemens S7-300 or S7-400 programmable logic controller. |
Multi-platform probe |
You can add this sensor to a multi-platform probe. |
IPv4 |
This sensor only supports IPv4. |
Performance impact |
This sensor has a very low performance impact. |
Lookups |
This sensor uses lookups to determine the status values of one or more channels. |
Connection errors |
If the sensor shows a connection failure error message, such as Connection timed out, Unreachable peer, or Connection refused, make sure that the values you defined in the port, rack, and slot settings in the Connection Settings for Siemens S7 on the parent object are correct. |
Basic Sensor Settings
The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
- siemens
- s7
- plc
- s7ledstatusensor
For more information about basic sensor settings, see section Sensor Settings.
Sensor Display
Setting |
Description |
|---|---|
Primary Channel |
Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.
|
Graph Type |
Define how this sensor shows different channels:
|
Stack Unit |
This setting is only visible if you select Stack channels on top of each other above. Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so. |
Debug Options
Setting |
Description |
|---|---|
Result Handling |
Define what PRTG does with the sensor result:
|
This option is not available when the sensor runs on the hosted probe of a PRTG Hosted Monitor instance.By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click 
under the corresponding setting name to disable the inheritance and to display its options.
For more information, see section Inheritance of Settings.
PRTG divides LEDs into four categories and assigns a default lookup file to each category. The lookup file defines how the sensor interprets the behavior of each LED. If you want to change how the sensor reacts to LED behavior, select a different lookup in the channel settings for the respective LED.
Category |
Lookup file |
LED is off |
LED is on |
LED is flashing |
|---|---|---|---|---|
Control LEDs |
prtg.standardlookups.paessler.s7.led_indicates_ok |
The sensor shows the Down status |
The sensor shows the Up status |
The sensor shows the Warning status |
Warning LEDs |
prtg.standardlookups.paessler.s7.led_indicates_warning |
The sensor shows the Up status |
The sensor shows the Warning status |
The sensor shows the Warning status |
Error LEDs |
prtg.standardlookups.paessler.s7.led_indicates_error |
The sensor shows the Up status |
The sensor shows the Down status |
The sensor shows the Down status |
Undefined LEDs |
prtg.standardlookups.paessler.s7.led_unknown |
The sensor shows the Unknown status |
The sensor shows the Unknown status |
The sensor shows the Unknown status |
Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.
The sensor creates one channel for each LED that is present on the given PLC.
Channel |
Description |
|---|---|
BAF (Battery Fault/Overload) |
The status of the BAF LED
|
BUS1F (Bus Error Interface 1) |
The status of the BUS1F LED
|
BUS2F/BUS5F (Bus Error Interface 2 or 5) |
The status of the BUS2F or BUS5F LED
|
BUS3F (Bus Fault Interface 3) |
The status of the BUS3F LED
|
CF (Communication Failure) |
The status of the CF LED
|
CRST (Cold Restart) |
The status of the CRST LED
|
DC24V |
The status of the DC24V LED
|
Downtime |
In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status. |
EXTF (External Error) |
The status of the EXTF LED
|
FRCE (Force) |
The status of the FRCE LED
|
IF (Init Failure) |
The status of the IF LED
|
IFM1F (Interface Error module 1) |
The status of the IFM1F LED
|
IFM2F (Interface Error module 2) |
The status of the IFM2F LED
|
INTF (Internal Error) |
The status of the INTF LED
|
MAINT (Maintenance Required) |
The status of the MAINT LED
|
MF (Monitoring Failure) |
The status of the MF LED
|
MSTR (Master) |
The status of the MSTR LED
|
RACK0 (Rack Number 0) |
The status of the RACK0 LED
|
RACK1 (Rack Number 1) |
The status of the RACK1 LED
|
RACK2 (Rack Number 2) |
The status of the RACK2 LED
|
REDF (Redundancy Error) |
The status of the REDF LED
|
RUN |
The status of the RUN LED
|
SF (Group Error) |
The status of the SF LED
|
STOP |
The status of the STOP LED
|
TF (Task Failure) |
The status of the TF LED
|
UF (User Failure) |
The status of the UF LED
|
USR (User-defined) |
The status of the USR LED
|
USR1 (User-defined) |
The status of the USR1 LED
|
KNOWLEDGE BASE
What are beta sensors and how can I use them?
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