Influence Of The Value Range On The Analog Input; Influence Of The Value Range On The Analog Output - Siemens Simantic ET 200S Manual

4.4.2

Influence of the Value Range on the Analog Input

The response of the electronics modules with analog inputs depends on the part of the value
range in which the input values are located. The table below shows this dependency..
Table 4-28 Response of the Analog Modules, Depending on the Location of the Analog Input Value in the Range of
Values
Measured value within ...
Rated range
Overshoot/undershoot range
Overflow
Underflow
Before setting parameters or with faulty
parameters
1
With 2AI U Standard, 2AI I 2WIRE Standard, 2AI I 4WIRE Standard, 2AI RTD Standard, 2AI TC Standard with product
1
status 1 applies: If the parameter setting error diagnostics message is triggered because of incorrect parameter setting
(e.g. wire break in measuring range ± 20 mA), the SF LED on the module lights and the diagnosis can be evaluated. In this
status correct input values are sent to the DP master.
4.4.3

Influence of the Value Range on the Analog Output

The response of the electronics modules with analog outputs depends on the part of the
value range in which the output values are located. The table below shows this dependency..
Table 4-29 Response of the Analog Modules, Depending on the Location of the Analog Output Value in the Range of
Values
Output Value is in ...
Rated range
Overshoot/undershoot range
Overflow
Underflow
Before setting parameters or with faulty parameters
With 2AO U Standard, 2AO I Standard with product status 1 applies: If the configured substitute value is outside the
1
nominal range, a diagnostics message for a parameter setting error is registered and the SF LED lights. In this status the
output values transferred from the DP master are output at the analog output modules.
ET 200S
Manual, Edition 10/2005, A5E00514527-01
4.4 Response of the Analog Modules during Operation and if Faults Occur
Input value in SIMATIC S7 Format
Measured value
Measured value
7FFF
H
8000
H
7FFF
H
1
Input value in SIMATIC S5 Format
Measured value
Measured value
End of overshoot range +1 plus
overflow bit
End of undershoot range -1 plus
overflow bit
7FFF
H
Input value in SIMATIC S5/S7 format
Value from DP master
Value from DP master
0-signal
0-signal
0-signal
Analog electronic modules
4-25