Emerson SI-PROFIBUS

102 Unidrive M SI-PROFIBUS User Guide
Issue Number: 3
Double word: A 32-bit word, this may be signed or unsigned.
DPV 0,1,2: This describes the specification version of SI-PROFIBUS used.
Grounding/Earthing: Describes the electrical safety or shielding connections for the
module.
Endian format: When a value uses more than eight bits to represent its value it needs
to be sent in sets of eight bits (bytes) across the network, the endian format determines
the order the bytes that constitute the whole value are transmitted.
Event task: A way to use a message or change of state to trigger a software routine.
FREEZE: A method of preventing input state changes from being sent to the master,
until a FREEZE signal is sent, this is used in conjunction with UNFREEZE.
Grounding: See Earthing
Groups: Groups are used with the SYNC and FREEZE commands. A group defines
which nodes respond to a specific SYNC or FREEZE command.
GSD file: A file that defines the properties of a node. The file contains information
describing the features available on the device.
IN data: Data that is returned from a slave device to the PROFIBUS master.
Long word: A 32-bit data word that may be signed or unsigned.
Network Loss Trip: A way to determine when a node has lost contact with the master.
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.
Main actual value: This gives feedback on the running speed of the drive when using
the PROFIdrive profile.
Main Setpoint: The value used to determine the speed of the drive when using the
PROFIdrive profile.
Mapping: The process of linking PROFIBUS values to parameters within the drive.
Master: The controlling device on the network, generally this will include programming
features.
Mode 1 non-cyclic: A method of sending non-cyclic data using a single word.
Mode 2 non-cyclic: A method of sending non-cyclic data using four words.