Part
4. Programming Guide
126
Design Guide
DCM014A51
4. The Remote Controller On/Off and Mode adjustment can be prohibited during the occupied
hours. However, On/Off may need to be permitted during the unoccupied period for the Timed
Override operation.
3. Notes
3.1 Indoor Unit EEPROM
1. Every change made is sent to the respective indoor unit. When the same data value is resent
from the BMS, it is not counted as change to the indoor unit.
2. The indoor unit stores the latest setting in the EEPROM. The maximum writable entries are
limited to 1,000,000 (depending upon indoor unit model) for each data item. This allows the
indoor unit to resume using the previous setting after a power failure.
3. Changes should be kept at a minimum of 70,000-80,000 times per year.
a. Rule of thumb:
Do not change settings frequently. Keep below 200 change settings per day for each data
item.
3.2 Priority Array
1. An object in the
iTM
BACnet® Server Gateway has a priority array, so that the highest priority
value is sent to the indoor unit.
2. The indoor unit does not have priority. The last change will be valid for the indoor unit either
from the
iTM BACnet
Server Gateway,
iTM
or Remote Controller.