Parameter Access Monitoring (Pam) - Lenze i55AE125B Manual

9.2.5

Parameter access monitoring (PAM)

The parameter access monitoring can be used as basic protection against a control loss of the
inverter. Monitoring is triggered if a parameter write access to a certain index does not take
place at regular intervals via the established communication connection.
Preconditions
This monitoring only works when the network control is activated.
Except for the keypad, the monitoring can be used for all communication connections, for
instance:
PC/Engineering Tool <--> inverter with USB module
•
PC/Engineering Tool <--> inverter with WLAN module
•
Controller <--> network <--> inverter with network option
•
Details
For monitoring purposes, a non-zero value must be written into the "Keep-alive register"
0x2552:002 (P595.02) at regular intervals. The first write access with a non-zero value acti-
vates monitoring. The intervals between the write accesses must not be higher than the time-
out time set in 0x2552:003
time-out time, monitoring is triggered: The response selected in
place and the action selected in
0x2552:006 (P595.06) is set to "1".
The error status can be left by a normal "error reset". Since monitoring continues to be active
and the time-out time is not reset by the error reset, the inverter immediately changes again
to the error status. In order to prevent his, you have the following options:
a) Restore communication exchange.
b) Set the monitoring response in
[1]".
c) Change over to local or flexible control.
Parameter Name / value range / [default setting]
0x2552:002 Parameter access monitoring: Keep alive register
(P595.02) (PAM monitoring: Keep alive reg.)
0 ... [0] ... 65535
• From version 04.00
0x2552:003 Parameter access monitoring: Time-out time
(P595.03) (PAM monitoring: Time-out time)
0.0 ... [10.0] ... 6553.5 s
• From version 04.00
0x2552:004 Parameter access monitoring: Reaction
(P595.04) (PAM monitoring: Reaction)
• From version 04.00
• For further possible settings, see parameter
0x2D45:001
0 No response
0x2552:005 Parameter access monitoring: Action
(P595.05) (PAM monitoring: Action)
• From version 04.00
0 No action
1 Reserved
(P595.03). If no parameter write access takes place within the
0x2552:005 (P595.05). In addition, the status bit 1 in
0x2552:004 (P595.04)
(P310.01).
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Configuring the network
Parameter access monitoring (PAM)
0x2552:005 (P595.05)
to "No response [0]" or "Warning
Info
Register for cyclic parameter write accesses for monitoring the commu-
nication link.
• If the setting is non-zero, the monitoring is active.
• In order that the monitoring is not tripped, a non-zero value has to be
entered into this index at regular intervals. The temporal distances of
the write accesses must not be higher than the time-out time set in
0x2552:003 (P595.03).
Maximum permitted time between two write accesses to the "keep-
alive-register".
In case of a time-out
• the error response selected in
• the action selected in 0x2552:005 (P595.05)
• the status bit 1 in 0x2552:006 (P595.06)
Selection of the response to the triggering of the parameter access mon-
itoring.
Associated error code:
33045 | 0x8115 - Time-out (PZÜ)
•
Selection of the action to be executed if the parameter access monitor-
ing is triggered.
Predefined process data words
takes
0x2552:004 (P595.04) is effected,
is effected,
is set to "1".
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