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Communication monitoring
The Altivar 61 drive incorporates communication monitoring mechanisms.
Principle
Following initialization (power-up), the drive waits until at least one command or reference parameter has been written for the first time by
the network.
Then, the network is monitored and if a network fault occurs, the drive reacts according to the configuration (ignore fault, stop on drive fault,
speed maintenance, fallback speed, or stop without fault).
The drive can start only once all the command and reference parameters of the active network have been written.
Network monitoring criteria
The network is monitored in accordance with protocol-specific criteria, which are summarized in the table below and specified in the
corresponding protocol manual.
(1) If the drive is configured to trip on a fault in the event of a network fault.
If an anomaly is detected, the port or network card indicates a network fault.
Protocol Network problem Related drive fault (1)
Integrated Modbus ports • Adjustable time-out for received requests destined for the drive [Modbus com.] (SLF1)
Integrated CANopen port
•Bus Off
• Life Guarding
• CANoverrun
• Heartbeat
• NMT state machine transition
[CANopen com.] (COF)
Modbus TCP/IP Ethernet
card
Network management fault:
• FDR fault
• IP address duplication fault
[External fault com.]
(EPF2)
Communication fault:
• Adjustable time-out for received control word (I/O scanning or
messaging)
• Network overload
[Com. network] (CnF)
Fipio card
• Non-adjustable time-out for received periodic variables destined for
the drive
Modbus Plus card
• Adjustable time-out:
• Either for received periodic variables (Peer cop) destined for the
drive
• Or for Modbus messages destined for the drive, if no periodic
variables (Peer cop) configured
Modbus card
• Fixed time-out (10 s) for received requests destined for the drive
Uni-Telway card • Fixed time-out (10 s) for master polling
Profibus DP card
• Adjustable time-out (via the network configuration software) for
received periodic variables (PZD and PKW) destined for the drive
INTERBUS card
• Time-out for received periodic variables destined for the drive
DeviceNet card
Communication fault:
• Adjustable time-out:
• Either for received periodic variables (Polling and COS)
destined for the drive
• Or for network activity, if no periodic variables configured
Configuration fault:
• The drive configuration is incompatible with the selected assembly
devices
[External fault com.]
(EPF2)