Fail-Safe Modules
7.4 PM-D F DC24V PROFIsafe Power Module
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
101
7.4.5
Diagnostic Functions of PM-D F DC24V PROFIsafe
Behavior in Case of Supply Voltage Failure
The failure of the PM-D F DC24V PROFIsafe power supply is always indicated by the PWR
LED on the module (light off). The failure of the electronics power supply is indicated by the
U1 LED of the module (light off). This information is also provided on the module (entry in
diagnostics data). Either all shutdown groups of the module (SG 1 through SG 6) are
passivated or, in the case of channel-specific passivation, only the relevant shutdown groups
are passivated.
In the case of a voltage dip in the external auxiliary voltage, the SF LED lights up, the
module is passivated.
With the subsequent supply recovery (level must remain above the specified value for at
least 1 minute (refer to the technical specifications: voltages, currents, electrical potentials))
the SF LED goes out again, the module remains passivated. The SF LED flashes if there are
no other errors, until the error is acknowledged.
Diagnostic functions
The table below provides an overview of the diagnostic functions of the PM-D F DC24V
PROFIsafe. The diagnostic functions are assigned either to a channel or the entire module.
Table 7- 14 Diagnostic functions of the PM-D F DC24V PROFIsafe
Diagnostic Function*
Fault
Number
LED
Effective Range of
Diagnostics
Can be
assigned
parameter
s
Short circuit
1
H
SF
Channel
No
Overtemperature
5
H
SF
Module
No
Internal error
9
H
SF
Module
No
Parameter assignment fault
10
H
SF
Module
No
Sensor voltage or load voltage missing
11
H
SF
Module
No
Communication problem
13
H
SF
Module
No
*: Specially for F-modules; display in
STEP 7
, see "Channel-Specific Diagnostics, Fault Types of Fail-
Safe Modules" table
