Festo Электромотор MTR-DCI - Manual (Page 21)

Contents and general safety instructions
XIX
Festo P.BE-MTR-DCI-DN-EN en 1209a
Term Meaning
Software end position Programmable stroke limitation (point of reference = axis zero point)
– Software end position, positive:
Max. limit position of the stroke in the positive direction; must not be
exceeded during positioning.
– Software end position, negative:
Min. limit position in the negative direction; must not be exceeded
during positioning.
Teach mode
(Teach mode) Operation mode for setting positions by moving to the target position
e. g. when creating position set records.
Jog mode Moving manually in positive or negative direction.
Position set record Positioning command defined in the position set table, consisting of:
– The number of the position set record
– The absolute or relative basis of the target position
– Target position
– Positioning speed
Fieldbus specific terms
Terminating resistor Resistor for minimizing signal reflections. Terminating resistors must be
installed or switched in at the end of bus segment cables.
Bit Strobe All slaves are queried by a command from the
master. Used for transferring small quantities of data between a master
and one or more slaves, e.g. for synchronisation of input or output data
(not supported by MTR-DCI)
COS/Cyclic The messages are sent from the master or slave cyclically (in a fixed time
interval) or when a state change occurs. With COS messaging, a message
is generated “cyclically” when not status change occurs within a given
timeframe; for this reason, COS and Cyclic are often treated as the same
message type.
Explicit Messaging Direct connection Explicit Messaging represents an (acyclic) low priority,
point-to-point communications connection between two devices and is
typically used for configuration and diagnostic purposes. Explicit mess-
ages contain the address and value of an attribute and also an identifier
(service code) describing how the data is to be handled.