Schneider Electric 61 Communication monitoring, Principle, Network monitoring criteria, Protocol

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.

Protocol		Network problem	Related drive fault (1)
Integrated Modbus ports	•	Adjustable time-out for received requests destined for the drive	[Modbus com.] (SLF1)
	•	Bus Off
	•	Life Guarding
Integrated CANopen port	•	CANoverrun	[CANopen com.] (COF)
	•	Heartbeat
	•	NMT state machine transition
	Network management fault:
	•	FDR fault	[External fault com.] (EPF2)
Modbus TCP/IP Ethernet	• IP address duplication fault
	Communication fault:
card
	• Adjustable time-out for received control word (I/O scanning or
		messaging)
	•	Network overload
Fipio card	• Non-adjustable time-out for received periodic variables destined for
		the drive
	• Adjustable time-out:
		• Either for received periodic variables (Peer cop) destined for the
Modbus Plus card		drive
		• Or for Modbus messages destined for the drive, if no periodic
		variables (Peer cop) configured	[Com. network] (CnF)
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
	Communication fault:
	• Adjustable time-out:
		• Either for received periodic variables (Polling and COS)
DeviceNet card		destined for the drive
		• Or for network activity, if no periodic variables configured
	Configuration fault:
	•	The drive configuration is incompatible with the selected assembly	[External fault com.] (EPF2)
		devices

(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.

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