Rockwell Automation 1395 Digital Reference Adapter for RTP Applications - Manual (Page 22)

Publication 1395-RTP-5.2 - September 1997
3-2 Control Description
The Parameter number ranges for Port A are:
• Port A Configuration Parameters (400 – 499)
• Port A Set-Up Parameters (550 – 599)
State Diagrams The internal programmable digital logic contains logic states or
modes and control states or modes of operation which directly
correlate to the RTP Unwind Drive application.
Each logic state or mode has been written so that the Drive remains in
that specific mode until a programmable event or sequence of events
occurs to redirect the logic and the reference control to that of a
different state. Each of the logic control states has, as its main
function, the logic control of the Drive; in other words, whether the
Drive is ready to run, running, or stopping or stopped or faulted.
The Drive reference control states have been written in the same
manner as the logic control states in that the Drive remains in the
particular control state until a given set of conditions causes the state
to be changed. Note, however, that the reference control states has, as
its controlling quantities, the logic states of the logic state drawing
contained in the RTP system binder. Each of the reference control
states has, as its main function, the control of the Drive references, in
other words whether the Drive is receiving a line speed reference, or
preset speed reference #1, #2 or #3, and whether or not the process
trim, in this case the dancer trim system, is active or not.
The Drive normally operates in the NORMAL RUN mode (mode 1).
To observe that the Drive is in this mode, monitor Parameter 596 with
either the DHT or the ITS and a computer connected to the RS422
port. The speed reference is normally in line speed reference control
mode, LSR, mode 21, which can be observed by monitoring
parameter 597. The process trim is normally active which can be
observed by monitoring parameter 598. As the Drive is sequenced
through a paste cycle, or any other cycle, the values of the Parameters
596, 597 and 598 will provide the user with a direct knowledge of the
mode in which the Drive is presently operating, and which references
are active for the Drive.