Effect Of The Value Range For Analog Values - Siemens SIMATIC S7-400 Reference Manual

Analog modules
5.6 Behavior of the analog modules
5.6.3

Effect of the value range for analog values

Effect of errors on analog modules with diagnostics capability
Errors may lead to an entry in the diagnostics buffer and trigger a diagnostic interrupt at analog
modules with diagnostics function and corresponding parameter settings. You will find the
errors that might be involved in the section "Diagnostics of the analog modules".
Effect of value range on the analog input module
The reaction of analog modules is determined by the actual input values within the value range.
Table 5-39 Reaction of analog input modules as a function of the actual analog value within the value range
Measured value within
Nominal range
Overshoot/undershoot range
Overflow
Underflow
Outside of the programmed limit
Only for modules with diagnostics function and depending on parameter settings
1
Effect of value range on the analog output module
The reaction of analog modules is determined by the actual output values within the value
range.
Table 5-40 Behavior of the analog output modules as a function of the position of the analog value within the value range
Output value within
Nominal range
Overshoot/undershoot range
Overflow
Underflow
194
Input value LED (EXTF)
Measured value -
Measured value -
7FFFH lit
1
8000H lit
1
Measured value -
Output value LED (EXTF)
CPU value -
CPU value -
0 signal -
0 signal -
Diagnostics
-
-
Entry is made
1
Entry is made
1
-
Diagnostics
-
-
-
-
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
Interrupt
-
-
Diagnostic interrupt
1
Diagnostic interrupt
1
Hardware interrupt
1
Interrupt
-
-
-
-