Siemens Simatic M7-400 Reference Manual page 249

Effect of Range of Values on the Analog Output Module
The behavior of the analog modules depends on where the output values lie within
the value range.
Table 5-40 Behavior of the Analog Output Modules as a Function of the Position of the
Process Value
Lies Within
Rated range
Overrange/und
errange
Overflow
Underflow
5.5.3 Effect of Operational Limit and Basic Error Limit
Operational Limit
The operational limit is the measuring error or output error of the analog module
over the entire temperature range authorized for the module, referred to the rated
range of the module.
Basic Error Limit
The basic error limit is the operational limit at 25°C, referred to the rated range of
the module.
Note
The percentage details of operational and basic error limits in the technical
specifications of the module always refer to the highest possible input and output
value in the rated range of the module.
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Analog Value Within the Range of Values
Output Value
(EXTF)
CPU value
CPU value
0 signal
0 signal
LED Diagnostics
– –
– –
– –
– –
Analog Modules
Interrupt
–
–
–
–
5-33