Model 9113-1-X Product Manual
Page 3
Theory of Operation
The 9113 allows a PLC to read and write parameters within the Ultra 3000 drive using the Message Instruction.
The parameters in the Ultra 3000 are mapped to File/Element numbers so the PLC accesses the Ultra
parameters as though they were File/Elements in a peer PLC
For the PLC to read or write File/Elements it must first establish a TCP connection to the 9113. Next the PLC
must request a session identification number from the 9113. The PLC is then ready to read and write
File/Elements as instructed by the PLC program. The TCP and session connections are transparent to the user
and PLC program but do have implications that require understanding. Once a session is established between
the 9113 and PLC it can remain indefinitely providing both devices remain wired, powered, and active.
Once a session is established the 9113 expects the PLC to make regular read/write requests. If a request is not
received for a thirty seconds then the session will be cancelled and the TCP connection will be closed. The mode
LED will be flashing green when a session is active and amber when no session is active..
When using a MicroLogix or SLC 500 Processor use the
500CPU Read
and
500CPU Write
commands. When
using a CompactLogic Processor use the
SLC Typed Read
and
SLC Typed Write
commands.
9113 Utility software is available free of charge at the
Quartech Corporation web site.
Also available is the latest version of this product manual
plus other related manuals and documents.
PM 9113-1-X R evision 0