Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 15)

Introduction
Chapter 1
1Ć5
WARNING: Do not use a 1770-T1 or 1770-T2 industrial
terminal to edit or change a program or data table values
in PLC-2/30 memory that were generated using a 1770-T3
industrial terminal. Block instructions and instructions with
word addresses 4008 or greater will not be displayed properly
(Figure 1.1). The ERR message may appear randomly in the
user program at instructions and addresses that the -T1 and -T2
industrial terminals are not designed to handle. Changes to the
user program and/or data table with a -T1 or -T2 terminal could
result in unpredictable machine motion with possible damage to
equipment and/or injury to personnel.
Figure 1.1
ERR Message for Invalid Display of Processor Memory
]ą[
113
14
(ą)
1025
16
]ą[
11314
(ą)
02516
1770ĆT3 Display (Actual content in processor memory)
1770ĆT1 or ĆT2 Display (Invalid display of processor memory)
ERR
Additional information regarding PLC-2/30 programmable controller
components is available in:
PLC-2/20, PLC-2/30 Programmable Controller Assembly and
Installation Manual (publication 1772-6.6.2) contains necessary
information on installation, assembly, maintenance and troubleshooting.
Appendix C, Programming 0.01-Second Timers with the Mini-PLC-2
Programmable Controller.
1.3
Additional Publications