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Rotary Minus indexes move to the specified position, but are forced to travel in the negative (or minus) direction. Rotary
Minus index positions must be within the rotary rollover range.
Example 6: As in examples 2 and 4 above, the starting position is at 90° and 80° is the specified position. A Rotary
Minus index would travel 10° in the negative direction. At the completion of this index the motor position would be 80°.
Example 7: If the starting position is 15° and the specified position is 270°, a Rotary Minus index would travel 105° in
the negative direction.
Correction Indexes - FM-4E Only
A Correction index is intended to continuously run on the second profile correcting any position drift. It will adjust the
motor position based on changes to it's index.#.dist parameter. The Correction indexes use incremental distance values.
Updates to the index distance while the correction index is executing will take effect immediately by recalculating the index
on the fly. Another words, if this index is in progress and the distance value is changed, the move profile instantaneously
recalculates based on the index's current position, speed and acceleration. Once the Correction index is initiated it will
remain active until stopped by the user with the Profile.#.MotionStop function.
Example: Correction index distance sources are user program calculations, fieldbus inputs or analog input values. The
index distance value can be updated via Fieldbus, by simply writing to the index distance parameter. If the analog input's
Destination Variable is set to the Index.#.Dist parameter, the index's distance value will be updated by the Analog Input.
This can be set to a automatic refresh using the Analog Input view.
Posn Tracker Cont and Posn Tracker Once Indexes - FM-4E Only
Posn Tracker Cont and Posn Tracker Once are indexes which expect their position values to be dynamically changed while
executing. Position Tracker indexes use absolute position values. Posn Tracker Cont index once initiated, will remain active
until stopped by the user with the Profile.#.MotionStop function. The Posn Tracker Once index will accept position changes
until the target position is reached, at which point the index is complete.
The index 's position value can be updated via fieldbus, by simply writing to the index position parameter. Posn Tracker
Indexes are used to follow dynamic changes to the end point of the index prior to and during the index motion. If the analog
input's Destination is set to an Index.#.distance, the index's position value will be updated by the Analog to Position scaling
found in the Analog Input view.
Posn Tracker also accepts on the fly changes to index velocity, acceleration and deceleration. The index is recalculated on
the next trajectory update.
How Communications Work
Configuring Communication
Before attempting to upload or download a configuration file using PowerTool Pro, the software must be configured to the
correct communication settings for the intended communication connection. The FM-4, FM-4DN and FM-4PB support a
serial communication connection, either RS-232 or RS-485. The FM-4E supports both serial and Ethernet communication
connections.
When downloading or uploading a selected configuration file that is open in PowerTools Pro the communication scanner will
only scan the configuration file's Modbus ID and Ethernet address (unless Ethernet change address is clear). Once a
connection is established, that connection (Comm port used, port number, modbus ID and Ethernet address) is saved, a second
download, upload or reconnect will bypass the scanner and use this previously defined communication path. To change the
communication path use the Change Path toolbar button.
The communication connection may be selected in the Upload Drive Configuration, Download to Device IDx or the Change
Path dialog boxes. From the Device menu, choose Upload Drive, Download or Path Change to open the dialog box or the
toolbar buttons can also used, see below.
Upload Drive
Uploading is the process of reading information back from the drive to the PowerTools Pro configuration file views.
To upload information from a drive, click on the Upload All button, on the PowerTools Pro toolbar or from the
Device menu, choose Upload All or Upload Drive. The Upload Drive Configuration dialog box will open, all
communication connections are scanned and the results appear. In Figure 27, it shows that one device on COM 1
Operational Overview
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