Rockwell Automation 1397 DC Drive Firmware 2.xx - Manual (Page 253)

Using SCANport Capabilities D–3
Publication 1397-5.0 — June, 2001
SCANport consists of two parts: control and analog I/O. The
SCANport controls are functions that control the motor, such as start,
stop, and jog. The control can come from up to six SCANport
devices and one Terminal Board simultaneously. The control is
based on an ownership mechanism that allows certain functions to
have only one owner and other functions to have multiple owners.
Control of these functions
can come from only one device: Any device can control
these functions:
Speed reference
Direction
Local Run Stop
Jog Clear Fault
MOP
Ownership is determined when a SCANport device commands a
function. As long as that function is commanded, that device is the
owner of that function.
For Example: If device 1 is commanding a forward direction, which
is a one owner function, no other device can change the direction
until device 1 stops commanding the forward direction. If device 1
is commanding a start, which is a multiple owner function. other
devices can also command a start. If device 1 stops commanding the
start, the Drive does not stop running if another device is still
commanding the start.
A rising edge is required for start and jog functions. If a jog or start
is still commanded after the Drive is stopped, start and jog functions
will not operate from any device until the jog or start commands are
removed.
Start commands from SCANport devices are 3 - wire (maintained)
latched.
Determining Function Ownership – To determine which device is
issuing a specific command, use parameters 214 through 221.
To determine which device
is issuing this command: Check this
Parameter:
Stop
Direction Owner
Run
Jog
Speed reference
Clear Fault
MOP
Local 214
216
215
217
218
219
220
221
File: Program/Display
Group: Owners
Stop Owner
Direction Owner
Run Owner
Jog Owner
Reference Owner
Flt Reset Owner
MOP Owner
Local Owner
For each of these parameters, each bit represents a device as detailed
in the following table:
Configuring the SCANport
Controls