Festo CPX-CMAX - Page 95

B Glossary
Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English 95
Term/abbreviation Description
Identification System function where specific characteristics of the connected axis can be
determined, e.g. the break-away forces, frictional behaviour, dynamics
(maximum accelerations and speeds), etc., by means of an identification run.
Incremental
displacement
encoder
A path measuring system in which the measurement variable refers to a
reference point and is determined by counting equally large measurement
steps (increments).
I/Os Digital inputs and outputs
Jog mode Manual travel in a positive or negative direction.
Function for setting positions by approaching the target position, e.g. for
teaching records.
Logic 0 Input or output provides 0 V (also LOW, FALSE or logic 0).
Logic 1 Input or output provides 24 V (also HIGH, TRUE or logic 1).
O Digital output. From the point of view of the higher-order controller, the CMAX
control inputs are module output data (è Communication profile description,
P.BE-CPX-CMAX-CONTROL-... .).
OB Output byte
Operating mode Type of CMAX control, function or setpoint specification.
Parameter Different settings which are defined for the system operation and have to be
saved in the CMAX.
Parameter number
(PNU)
Each parameter has a number and subindex. Notation: PNU xxxx:zz
(xxxx:parameter number, zz: subindex).
PLC/IPC Programmable logic controller/industrial PC (short: controller)
Position control Control mode where a defined position is approached under electronic control
and is kept.
Pressure/force
control
Control mode for which a defined force is built up via pressure control. The
term “force control” is used in this documentation.
Project zero point
(PZ)
Measuring reference point for all positions in positioning jobs (Project Zero
point). The project zero point forms the basis for all absolute position
specifications (e.g. in the record table or in direct mode). The basis point for
the project zero point is the axis zero point.
Record Positioning command defined in the record table with parameters (e.g. target
value, positioning mode, speed).
Reference point
(REF)
Point of reference for the incremental displacement encoder. The reference
point defines a known position within the travel of the drive.
Software end
position
Programmable stroke limit (point of reference = axis zero point).
Upper software end position:
Max. limit position in the positive direction (increasing actual values).
Lower software end position:
Minimum limit position in the negative direction (decreasing actual values).
Tab. B.1 Terms and abbreviations