Value Status - Siemens SIMATIC ET 200SP F-AI 4xI 0(4) 20mA 2-/4-wire HF Series Manual

6.4

Value status

Properties
In addition to the diagnostic messages and the status and fault display, the F-module
provides information about the validity of each analog input signal – the value status. The
value status is entered in the process image along with the input signal.
Value status for digital input and output modules
The value status is the binary additional information of an analog input signal. The value
status is entered in the process image of the inputs (PII) at the same time as the process
signal. It provides information about the validity of the analog input signal.
The value status is affected by all faults.
● 1
● 0
Note
You may only access the addresses occupied by user data and value status.
The other address areas occupied by the F-modules are assigned for functions including
safety-related communication between the F-modules and F-CPU in accordance with
PROFIsafe.
1oo2 evaluation of the sensors combines the two channels. With 1oo2 evaluation of the
sensors, you can only access the low order channel in the safety program, e.g. channel 0.
Assignment of the inputs and value status in the PII
Each channel of the F-module is assigned a value status in the process image of the inputs.
You can find the assignment in section Address space (Page 38).
Reference
A detailed description of the evaluation and processing of the respective input signals can be
found in the SIMATIC Safety – Configuring and Programming
(http://support.automation.siemens.com/WW/view/en/54110126) manual.
Analog input module F-AI 4xI 0(4)..20mA 2-/4-wire HF (6ES7136-6AA00-0CA1)
Manual, 08/2018, A5E41448857-AB
: A valid process value is output for the channel.
B
: A fail-safe value is output for the channel, or the channel is deactivated.
B
Interrupts/diagnostic messages
6.4 Value status
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