Lust MASTERCONTROL MC6000 Series, Инструкция по эксплуатации

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Instruction Manual MC6000
7-5
7.2 Reference Value Input
7.2.1 Short Description of Reference Inputs
The purpose of reference value input is to prepare an externally entered reference value and to
transfer it to the control. Parameters for reference value input are set specific to the application
when commissioning the Servo drive.
Four reference value selectors are used for selecting any number of reference value sources
(e.g. analog input, serial interface etc.). Each reference value selector has a permanent link
with an internal reference value channel. The channels are linked and can also be processed
mathematically. This produces the overall reference value which is then fed to the control.
Irrespective of the control mode, the reference values are entered in the same way. The reference
value entered always refers to the selected mode. Therefore the unit of this parameter always
relates to the current mode (Nm, min
-1
or r (=rotations)).
7.2.2 Description of Reference Inputs
The diagram "Structure of Reference Value Input" shows the detailed structure of reference
inputs.
The parameters for reference value input can be edited in _REF (Reference) of the PARA-Menu
and also display. The parameters which have been calculated, and therefore cannot be edited,
are identified in the diagram with an asterisk (*) after the parameter number.
There are 16 reference value inputs (A):
• 2 analog inputs
• RS485 serial interface
• digital reference value input (not with standard software)
• motorised potentiometer (MOP) via digital inputs
• P
OS
M
OD
1position controller
• Bus-Interfaces (e.g. Interbus-S-Local Bus Link)
• Application Hardware (e.g. I/O-Module 1)
• 8 fixed reference values which can be set via software
Reference Value Selectors (B):
Depending on the setting, the four reference value selectors RSSL1 to RSSL4 (Reference
Source Selector) the reference channels are fed from the reference sources. Each reference
source can be used as an input for several channels i.e. several selectors can point to one
source.
An offset SADD1 to SADD4 (Selector Addition) can be added to the selectors. This offset
consists of a 4-bit data word (= 0 -15). The offset can be changed using digital inputs if the
function selectors are suitably configured (c.f. Section on Function Selectors). In this way, the
settings of the reference selectors can be changed using digital inputs and switching is possible
between various reference sources, e.g. between two fixed values. The use of selectors and
switching via input is explained using examples in
Section 7.4.