Led (Read Led Status) Instruction - Siemens S7-1200 System Manual

Extended instructions
8.5 Diagnostics (PROFINET or PROFIBUS)
The GET_DIAG instruction uses the "L address" (LADDR) of the station to obtain the health
of the entire station. This L Address can be found within the Network Configuration view and
by selecting the entire station rack (entire gray area), the L Address is shown in the
Properties Tab of the station. You can find the LADDR for each individual module either in
the properties for the module (in the device configuration) or in the default tag table for the
CPU.
8.5.3

LED (Read LED status) instruction

Table 8- 115 LED instruction
LAD / FBD SCL
ret_val := LED(
Table 8- 116 Data types for the parameters
Parameter and type
LADDR IN
LED IN
RET_VAL OUT
For example, you can select the CPU (such as "PLC_1") or the PROFINET interface from the drop-down list of the
1
parameter.
346
laddr:=_word_in_,
LED:=_uint_in_);
Data type Description
HW_IO Identification number of the CPU or interface
UInt LED identifier number
1
2
3
4
5
6
Int Status of the LED
Description
Use the LED instruction to read the state of the LEDs on a CPU or
interface. The specified LED state is returned by the RET_VAL
output.
RUN/STOP
Error
Maintenance
Redundancy
Link
Tx/Rx
1
Color 1 = green, color 2 = yellow
Color 1 = red
Color 1 = yellow
Not applicable
Color 1 = green
Color 1 = yellow
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG