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5.0 S200 POSITION NODE THEORY OF
OPERATION
This section adds detail to the prior section discussing some basic functions that may be allowed
in each of the above-described applications. It also adds a great deal of background information
and insight on the products internal operation and logic behind it.
This section does not attempt to describe all features of the drive.
Other features may be disclosed in the S200 OC Tools section of the
manual. Please read that section as well.
NOTE
5.1 S200 OC T
The use of S200 OC Tools is described in detail later in this manual. S2000 OC Tools GUI is a
simple translator program that converts data between the drive and the user screens. The user is
presented data in a form that is useful and easy to understand. He can modify drive settings and
view drive settings in graphical or English language representation. The GUI communicates to the
drive over Modbus RTU is a more efficient, but cryptic, drive command variable and command
set. The drive's command and variable set is presented by the GUI on organized screens. The
user can view or change the data. The GUI then queries or sets the proper variables in the drive.
The drive variables are listed in the Section under Modbus. The GUI is designed, whenever
possible, such that holding the mouse on a variable entry box causes a flag to pop up indicating
the variable command name in the drive's variable set. The drive variables can be viewed or
modified directly, working around the standard GUI windows, using the Variable Browser or
Variable Editor functions. When working with the CAN bus or MODbus each variable can be
accessed by a register, according to the protocol.
5.2 D
E
RIVE
NABLE
The S200 Position Node has a power stage enabling logic that includes 3 main sources that must
be correct to get the drive to enable the power stage. (CANopen is more complex and is covered
in the CANopen reference document). First, the drive must be fault free. Any fault will cause an
internal software disable that cannot be reset without the fault condition reset. There is a
dedicated hardware enable input, Digital Input 1 that must be asserted (on) to enable the power
stage. Lastly there is a Software enable that must be active to enable the power stage. All three
conditions must exist to enable the power stage; No Fault, Hardware Enable Asserted, Software
Enabled.
The software enable bit powers up Enabled according to the S200 Position Nodes Default
settings. The user can change the default power up state to Software Disabled under the Drive
Setup \ Drive Setup\ Software Enable setting. (Variable name is AENA).
5.3 S
P
ETTING
The S200 Position Node allows the user to set the number of counts desired in a revolution. This
can be handy when entering positional and index length information in units more meaningful to
the application. The units are provide in a numerator / denominator fashion that allows the user to
select units that are scalable in a manor that will not loose any counts if the desired ratio can be
14
OOLS
U
OSITION
NITS
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