Siemens M7-400 Benutzerhandbuch

5-32

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Failure of the load power supply L+ of the diagnostics-capable analog module is
indicated in the case of parameterized two-wire transmitters by the EXTF LED on
the module. Furthermore, this information is made available on the module (entry in
diagnostic buffer).

Triggering of a diagnostic interrupt depends on the parameter assignment (see
Section 5.7).

Any errors that occur can lead to a diagnostics entry and a diagnostic interrupt with
analog modules with diagnostics capability and corresponding parameter
assignment. You will find the errors that might be involved in Section 5.16.

The behavior of the analog modules depends on where the input values lie within
the range of values.

Table 5-39 Behavior of the Analog Input Modules as a Function of the Position of the

Analog Value Within the Range of Values

Rated range

Measured
value

–

–

–

Overrange/
underrange

Measured
value

–

–

–

Overflow

7FFFH

Flashes

1

Entered

1

Diagnostic
interrupt

1

Underflow

8000H

Flashes

1

Entered

1

Diagnostic
interrupt

1

Beyond the
programmed
limit

Measured
value

–

–

Hardware interrupt

1

1)

 Only for modules with diagnostics capability and depending on parameter assignment