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 activates monitoring. The intervals between the write accesses must not be higher than the time-out time set in 0x2552:003 (P595.03). If no parameter write access takes place within the time-out time, monitoring is triggered: The response selected in 0x2552:005 (P595.05) takes place and the action selected in 0x2552:005 (P595.05). In addition, the status bit 1 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 0x2552:004 (P595.04) to "No response [0]" or "Warning [1]".
c.
Change over to local or flexible control.
Parameter
|
Address
|
Name / setting range / [default setting]
|
Information
|
|
|
0x2552:002
(P595.02)
|
Parameter access monitoring: Keep alive register
(PAM monitoring: Keep alive reg.)
0 ... [0] ... 65535
–
From version 04.00
|
Register for cyclic parameter write accesses for monitoring the communication 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).
|
|
|
0x2552:003
(P595.03)
|
Parameter access monitoring: Time-out time
(PAM monitoring: Time-out time)
0.0 ... [10.0] ... 6553.5 s
–
From version 04.00
|
Maximum permitted time between two write accesses to the "keep-alive-register".
In case of a time-out
–
the error response selected in 0x2552:004 (P595.04) is effected,
–
the action selected in 0x2552:005 (P595.05) is effected,
–
the status bit 1 in 0x2552:006 (P595.06) is set to "1".
|
|
|
0x2552:004
(P595.04)
|
Parameter access monitoring: Response
(PAM monitoring: Response)
–
From version 04.00
|
Selection of the response to the triggering of the parameter access monitoring.
|
|
|
0
|
No response
|
||
|
1
|
Warning
|
||
|
2
|
Trouble
|
||
|
3
|
Fault
|
||
|
0x2552:005
(P595.05)
|
Parameter access monitoring: Action
(PAM monitoring: Action)
–
From version 04.00
|
Selection of the action to be executed if the parameter access monitoring is triggered.
|
|
|
0
|
No action
|
||
|
1
|
Reserved
|
||
|
2
|
Write parameter
|
The value set in 0x2552:009 (P595.09) is written to the parameter set in 0x2552:008 (P595.08).
|
|
|
0x2552:006
(P595.06)
|
Parameter access monitoring: Parameter Access Monitoring-Status
(PAM monitoring: PAM status)
–
Read only
–
From version 04.00
|
Bit coded display of the status of parameter access monitoring.
|
|
|
Bit
0
|
Monitoring activated
|
1 = parameter access monitoring is active.
|
|
|
Bit
1
|
Timeout
|
1 = within the time-out time set in 0x2552:003 (P595.03), no successful parameter write access to the "keep-alive register" 0x2552:002 (P595.02) was made.
|
|
|
Bit
2
|
WLAN time-out
|
||
|
0x2552:007
(P595.07)
|
Parameter access monitoring: WLAN reset time-out time
(PAM monitoring: WLAN reset t.out)
0 ... [0] ... 65535 s
–
From version 05.00
|
Time after which the WLAN network with the current settings of the WLAN parameters is
restarted if no "keep alive" messages are received.
–
0 s = function deactivated (no WLAN restart).
–
With a setting > 0 s and a time-out, the control units sets 0x2440 = "Restart with current values [1]".
|
|
|
0x2552:008
(P595.08)
|
Parameter access monitoring: Mapped parameter
(PAM monitoring: Mapped par)
0x00000000 ... [0x400B0100] ... 0xFFFFFFFF
|
If the "Write parameter[2]" action is selected in 0x2552:005 (P595.05), the value set in 0x2552:009 (P595.09) is written to the parameter set in 0x2552:008 (P595.08).
|
|
|
0x2552:009
(P595.09)
|
Parameter access monitoring: Value to be written
(PAM monitoring: Value to write)
0 ... [0] ... 4294967295
|
||
|
0x2552:010
(P595.10)
|
Parameter access monitoring: Write status
(PAM monitoring: Write status)
–
Read only
|
Write status if the "Write parameter [2]" action is selected in 0x2552:005 (P595.05).
|
|
|
0
|
Ready/Success
|
||
|
1
|
In progress
|
||
|
2
|
Failed
|
||
Severity