Siemens SIMATIC Operating Instructions

Fail-Safe Electronic Modules
8.1 8 /16 F-DI DC24V PROFIsafe Digital Electronic Module
ET 200pro Distributed I/O System - Fail-Safe Modules
82 Operating Instructions, 05/2007, A5E00394073-02
Note
If you have enabled the short-circuit test for the F-DI module in
STEP 7 and are using only
one of the two internal sensor supplies of the module (Vs1 or Vs2, or Vs3 or Vs4), a channel
M-short circuit is detected for each of the four channels whose sensor supply is not used.
Four "short-circuit" diagnostic functions are generated in the diagnostic buffer of the F-
module.
Specific Characteristics for Fault Detection
Detection of some faults (such as short circuits or discrepancy errors) is dependent on the
use case, wiring, and parameter assignment of the short-circuit test. For this reason, tables
on fault detection are presented for the use cases in
"Use Case 1: Safety Mode
SIL2/Category 3" to "Use Case 3: Safety Mode SIL3/Category 4"
.
Causes of Faults and Corrective Actions
The following table presents the possible causes of faults and corrective actions for the
individual diagnostic messages of the 8/16 F-DI DC24V PROFIsafe electronic module.
Table 8-15 Diagnostic Messages of the 8/16 F-DI DC24V PROFIsafe Electronic Module, Causes of
Faults and Corrective Actions
Diagnostic
Message
Fault
Detection
Possible Causes Corrective Actions
Always Internal fault Replace module Short circuit
Cyclically
during
short-
circuit test
Short circuit at the
sensor
Cross circuit at the
sensor
Eliminate short circuit/cross circuit on sensor
Overtemper-
ature
Always Shutdown due to
violation of
temperature limit
values in the module
case.
Check ambient temperature.
Check whether permissible output current of the
sensor power supply is exceeded for the
ambient temperature.
Once the fault has been eliminated, the module
must be removed and inserted, or the power
switched off and on.
Fault Always Internal module fault
has occurred
Replace module
Inserted module does
not match
configuration
Correct the configuration (compare actual and
preset configuration).
Parameter
assignment
error
Always
PROFIsafe address
set incorrectly on the
F-module
Check whether the PROFIsafe address on the
module matches the configuration in
STEP 7
HW Config
No supply voltage or
supply voltage is too
low
Check module for proper contact.
Once the fault has been eliminated, the module
must be removed and inserted, or the power
switched off and on.
Sensor
voltage or
load voltage
is missing
Always
Voltage dip due to
short circuit
Eliminate short circuit/cross circuit.

Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)