Single slot addressing means each physical slot is 16 bits wide. Elements are addressed by number following the colon after the file designator, and individual bits within each element addressed by a number following a slash mark. Within each of the Allen-Bradley PLC’s “files” are multiple “elements,” each element consisting of a set of bits (8, 16, 24, or 32) representing data. 0 1 1-slot 1 1 2-slot.bit 13: 1 = load from EEPROM.bit 14: 1 = RAM backup not configured. Addressing for 1785 PLC-5 Processors This addressing reference guide helps you specify the address in a 1785. Allen-Bradley publication SGI–1.1, Safety Guidelines for the Application. I:4/0 means that it is the first input on the card. I:4/0 means that it uses Slot 4 (the 5th slot in the rack). Similar to the output structure, I:4/0 means that it is a physical input. An address that describes an input on an SLC 500 is I:4/0. Allen-Bradley uses the capital letter “I” to designate a hardwired input. 1 rack = 8 groups for 2-slot addressing, 1 group = 2 slots for 1-slot addressing, 1 slot = 1 group for half-slot addressing, 1 slot = 2 groups In the beginning, there were only 8-point IO modules and only 2-slot addressing. Allen Bradley Explain Groups When Addressing Sign in to follow this.
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