Siemens S7-1200 - Devicestates Instruction

Extended instructions
8.5 Diagnostics (PROFINET or PROFIBUS)
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
347
Table 8- 117 Status of RET_VAL
RET_VAL (W#16#...)
Description
0 to 9 LED state
0
LED does not exist
1
Off
2
Color 1 On (solid)
3
Color 2 On (Solid)
4
Color 1 flashing at 2 Hz
5
Color 2 flashing 2 Hz
6
Color 1 & 2 flashing alternatively at 2 Hz
7
Color 1 on (Tx/Rx)
8
Color 2 on (Tx/Rx)
9
State of the LED is not available
8091
Device identified by LADDR does not exist
8092
Device identified by LADDR does not support LEDs
8093
LED identifier not defined
80Bx
CPU identified by LADDR does not support the LED instruction
8.5.4
DeviceStates instruction
You can use the DeviceStates instruction to return the states of all distributed I/O slave
devices connected to a specified distributed I/O Master.
Table 8- 118 DeviceStates instruction
LAD / FBD
SCL
Description
ret_val := DeviceStates(
laddr:=hw_io_in_,
mode:=_uint_in_,
state:=_variant_inout_);
DeviceStates retrieves the I/O device
operational states of an I/O subsystem. After
execution, the STATE parameter contains the
error state of each I/O device in a bit list (for the
assigned LADDR and MODE). This information
corresponds with the device status seen in the
STEP 7 diagnostics view.
The LADDR input of DeviceStates uses the
hardware identifier of a distributed I/O interface.
In the TIA portal, the hardware identifiers for a
PLC can be found by looking for
"Hw_IoSystem" data types in the system
constants tab in the PLC tag table.