Issue
Spare Addresses for use as internal points on an SCU 1284 dual address
Product Line
TAC INET
Environment
- I/NET Access Control
- SCU1284 dual address mode
Cause
What are the ramifications of using the spare point addresses for internal points in an SCU 1284
Resolution
Note! It's generally not recommended to use the available address on a subLAN. Addresses marked as "Internal" in the MCU configuration are reserved for internal software points. However, it's crucial to consider that doing so may limit the potential expansion of the subLAN to utilize these addresses in the future.
When a SCU1284 is set to dual channel, it only uses 12 inputs, 8 outputs, and 4 reader points. Here is a list of all software points and their uses:
| XX00 DI - XX03 DI | Hardware Inputs used by doors |
| XX04 DI - XX07 DI | Spare Hardware Inputs |
| XX08 DI & XX09 DI | SCU tamper and power monitoring points |
| XX00 DO - XX03 DO | Hardware Outputs |
| XX04 DO - XX07 DO | Spare software only points |
| XX08 DO & XX09 DO | Reader Points |
| YY00 DI - YY03 DI | Hardware Inputs used by doors |
| YY04 DI - YY09 DI | Spare software only points |
| YY00 DO - YY03 DO | Hardware Outputs |
| YY04 DO - YY07 DO | Spare software only points |
| YY08 DO & YY09 DO | Reader Points |
See the following documentation: TCON312-0910.book (schneider-electric.com)
