Siemens SIMATIC User Manual

Principles of analog modules
5.4 Response of the analog modules
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
287
5.4.2 Influence of the range of analog values
influence of errors on analog modules with diagnostics functions
Errors may lead to an entry in the diagnostics buffer and trigger a diagnostics interrupt at
analog modules with diagnostics function and corresponding parameter settings.
Influence of the range of values on the analog input module
The reaction of analog modules is determined by the actual input values within the range of
values.
Table 5- 42 Reaction of analog input modules as a function of the actual analog value within the range of values
Measured value with-
in
Input value
SF LED
Diagnostics
Interrupt
Rated range
Measured value
-
-
-
Over-
shoot/undershoot
range
Measured value - - -
Overflow
7FFF
H
lit
1
Entry is made
1
Diagnostics interrupt
1)
Underflow
8000
H
lit
1
Entry is made
1
Diagnostics interrupt
1)
beyond programmed
limit
Measured value - - Process interrupt
1)
1)
, only supported by modules with diagnostics function, and depending on parameter settings
Influence of the range of values on the analog output module
The reaction of analog modules is determined by the actual output values within the value
range.
Table 5- 43 Reaction of analog output modules as a function of the actual analog value within the range of values
Output value within
Output value
SF LED
Diagnostics
Interrupt
Rated range
CPU value
-
-
-
Over-
shoot/undershoot
range
CPU value - - -
Overflow
0 signal
-
-
-
Underflow
0 signal
-
-
-

Siemens SIMATIC Specifications

General

Brand	Siemens
Model	SIMATIC
Category	Control Unit
Language	English