Fail-Safe Modules
7.2 PM-E F pm DC24V PROFIsafe Power Module
ET 200S Distributed I/O System - Fail-Safe Modules
74 Installation and Operating Manual, 08/2008, A5E00103686-07
7.2.4 Parameters of the PM-E F pm DC24V PROFIsafe
Parameters in
STEP 7
The table below lists the parameters that can be set for the PM-E F pm DC24V PROFIsafe.
Table 7- 3 Parameters of the PM-E F pm DC24V PROFIsafe
Parameter Range Default Type of Parameter Effective
Range
F-Parameters:
F_destination_address 1 to 1022 is assigned by
STEP 7
Static Module
F monitoring time 10 to 10 000 ms 150 ms Static Module
Module Parameters:
Behavior after channel
faults*
Passivate the entire
module/Passivate
the channel
Passivate the
entire module
Static Module
DO channel 0 Activated/deactivate
d
Activated Static Channel
Readback time 1 to 400 ms 1 ms Static Channel
Diagnostics: Wire
break
Activated/deactivate
d
Deactivated Static Channel
DO channel 1 Activated/deactivate
d
Activated Static Channel
Readback time 1 to 400 ms 1 ms Static Channel
Diagnostics: Wire
break
Activated/deactivate
d
Deactivated Static Channel
* This setting is relevant only with an installed
S7 distributed safety
V 5.4 or higher or generally with
S7 F systems
optional packages.
Readback Time Parameter
Each output channel has its own selectable readback time. This time specifies the maximum
duration of the turn off test for the corresponding channel and therefore also the readback
time for turning off the channel.
The following readback times can be set: 1 ms, 5 ms, 10 ms, 50 ms, 100 ms, 200 ms and
400 ms.
You should set an adequately high readback time if the channel involved switches high
capacitive loads. If the readback time for a controlled capacitive load is set too low, the
output channel is passivated because the discharge of the capacitance does not take place
within the turn off test.
If the readback signals are incorrect, the "short circuit" fault only causes passivation of the
output channel after the readback time has elapsed.
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