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Class See “DP Master”, “DP Master Class 1 (DPM1)” and “DP Master
Class 2 (DPM2)”.
Class 1 encoder Encoder class must be set when you configure the device.
Mandatory Class 1 provides the basic functions of the device
and can be used for:
•
sending the position value (see
Position value
parameter);
•
changing the counting direction (see
Code sequence
parameter);
•
setting the preset value (see
Preset value
parameter);
•
acquiring reduced diagnostic information (see
Diagnostic type
parameter = “16 bytes fixed (6+10)”).
Class 2 (+VEL) encoder Encoder class must be set when you configure the device.
Class 2 (+VEL) provides all the Class 1 and Class 2 functions
and additional velocity-related functions:
•
transmission of the velocity value (see
Position and
velocity values
parameter);
•
setting of the velocity measuring unit (see
Velocity
measure unit
parameter).
Class 2 encoder Encoder class must be set when you configure the device.
Class 2 provides all the Class 1 functions and additional
advanced functions such as:
•
scaling function (see
Scaling function control
,
Counts per revolution and Total resolution
parameters);
•
extended diagnostic information (see Diagnostic type
parameter = “16 bytes (6+10)” or “63 bytes (6+57)”).
Communication Function
Block (Comm FB) A basic function block defined for PROFIBUS DP and supplied
by the PLC manufacturer for the standardized access of user
programs to field devices. The standardization is based on IEC
61131-3. The PNO maintains a guideline "PROFIBUS
Communication and Proxy Function Blocks acc. to IEC 61131-
3", order no. 2.182.
Communication
Parameter Communication parameters are parameters, which adjust the
communication protocol function to the current net
configuration. Communication parameters exist for all phases
of the communication protocols. Examples are bus address,
token rotation time, idle time. See "Slave parametrization" and
"Device parametrization".
Communication Profile IEC 61158 comprises a summary of layer stacks of several
different fieldbusses. IEC 61784 defines the useful
combinations of these stacks via communication profiles
CPF3/1 up to CPF3/3 (PROFINET). One of these is PROFIBUS DP.
Within this communication profile three different physical
profiles are defined:
•
RS 485 (RS 485-IS);
•
MBP-IS (MBP-LP, MBP);