Emotron VS10 - Parameter Access Monitoring (PAM)

8.3. 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 timeout 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:
• Restore communication exchange.
• Set the monitoring response in 0x2552:004 (P595.04) to "No response [0]" or "Warning
[1]".
• Change over to local or flexible control.
Parameter
Name / value range / [default setting]
Info
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
"keepalive-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: Reaction
(PAM monitoring: Reaction)
From version 04.00
For further possible settings, see parameter
0x2D45:001 (P310.01).

163
Selection of the response to the triggering of the parameter access mon
itoring. Associated error code:
•
33045 | 0x8115 Time-out (PAM)
0
No response

Error types
 84
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
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.