Sharp UP-820F Instruction Manual page 58

The master declaration procedure is as follows:
While the master is down, the back-up master performs T-LOG polling as well.
NOTE
56
1.
Enter the PGM2 mode from the mode selection window.
2.
Select "DECLARATION" and press the
The DECLARATION window will appear.
3.
Select "MASTER DECLARE" and press the
e
key.
e
key.