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SI-INTERBUS User Guide
Issue Number: 1
Mode 2 - PPO4 word mode:
A method of sending 4 non-cyclic data words using cyclic
channels.
Network loss trip:
A method to determine when a node has lost communication with
the master.
Module ID code:
Indicates the type of solutions module that is fitted in the
corresponding slot.
Node:
A device on the network. This may be either a device such as a drive or part of
the network such as a repeater.
Non-cyclic data:
Data that is requested or sent by the master as required. This is not
sent on a regular basis and generally allows access to any parameter. This is useful for
occasional changes or configuration purposes.
Response ID:
The response code of the message received when using PPO4 word
non-cyclic communication.
Slave:
A device on the INTERBUS network such as a drive or sensor. A slave device
will only respond to messages from a master.
Status word:
A value that denotes the status of the drive. Each bit within the word will
have a specific meaning.
Telegram:
A message used within mode 1 non-cyclic data communication. This term is
sometimes used to represent a generic message on the network.
Termination:
This is used at both ends of a network segment to prevent reflections and
reduce noise.
Watchdog:
A method used to determine if a communication system is healthy. A typical
watchdog scheme uses a handshaking system to check both the master and slave are
participating in communications.
