Micro/SLC-500/PLC 5 Addressing Formats
The general format of value names for data from the listed controllers matches the naming convention used by the programming software. The format is shown below. The parts of the name shown in in square brackets [] are optional.
General Value Name Format: X: [file] element [.field] [/bit]
X is the file type. The following table lists valid file types, the default file number for each type, and fields allowed:
For an AB PLC, select the address-based input address for the discrete signal connected to point or terminal 4 of the input module in slot 3. The address for the discrete output is O:5.0/8. The letter O indicates an output address, and the 5 indicates that the output module is in slot 5. The 0 indicates data is in word 0. Part Number: 1756-A17: Manufacturer: Allen-Bradley / Rockwell Automation: Description: Allen-Bradley 1756-A17 17 Slot ControlLogix Chassis: Full Description: Allen-Bradley 1756-A17 ControlLogix chassis receives power from ControlLogix power supply. Compatible Power Supplies: 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75, 1756-PC75, 1756-PH75.
Plc 5 Slot Numbering Software
| X | File Type | Default File Number | Fields |
| O | Output | 0 | |
| I | Input | 1 | |
| S | Status | 2 | |
| B | Binary | 3 | |
| T | Timer | 4 | .PRE, .ACC, .EN, .TT, .DN |
| C | Counter | 5 | .PRE, .ACC, .CU, .CD, .DN, .OV, .UN, .UA |
| R | Control | 6 | .LEN, .POS, .EN, .DN, .ER, .UL, .IN, .FD |
| N | Integer | 7 | |
| F | Floating | 8 | |
| A | ASCII | None |
