Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 77)

Introduction to Programming
Chapter 4
4Ć13
WARNING: Use only Allen-Bradley authorized programming
devices to program Allen-Bradley programmable controllers.
Using unauthorized programming devices may result in
unexpected operation, possibly causing equipment damage
and/or injury to personnel. The Allen-Bradley Company will
not be responsible or liable for any damages, whether direct,
indirect, or consequential, arising out of the use of such
unauthorized programming devices.
All relay-type instructions are entered from the industrial terminal
keyboard with the processor in the program mode. When a relay-type
instruction is initially entered, it will appear intensified on the screen to
indicate the cursor’s present position. When a bit address is required,
the instruction will blink to indicate information is needed to complete
the instruction. The default bit address, 010/00, is displayed with a
reverse-video character cursor positioned at the first digit. This cursor
indicates where information is needed and moves to the next digits as
information is entered. When all information is entered. the instruction
stops blinking and remains intensified until the next instruction is entered.
Table 4.A describes the entry and display of relay-type instructions.
Six- or seven-digit bit addresses can be entered provided the data table has
been expanded to a 4- or 5-digit word address. To enter a 6- or 7-digit bit
address, the [EXPAND ADDR] key is required. It is pressed after the
instruction is entered and before the address is entered. The [EXPAND
ADDR] key will display either a 6- or 7-digit default bit address, 0010/00
or 00010/00, depending on the data table size. When a 7-digit bit address is
displayed and a 6-digit address is required, a leading zero must be entered
before the bit address.
4.3.5
Programming RelayĆType
Instructions