Mitsubishi Electric BAC-HD150 Instruction Book page 5

When sending 10 properties using Read_Property_Multiple, wait for at least 2000 ms (= 200 ms 10 properties) before
sending another request to BAC-HD150.
[Ex.2]
Read_Property_Multiple (10 properties)
(8) Restrictions on setting temperatures (dual set points/single set point)
Two types of temperature setting modes are used by some indoor units.
[Dual set points] . . . .Different temperature settings can be set to Cooling and Heating modes, and the Setback
[Single set point]. . . .The same temperature settings are used in both Cooling and Heating modes. (Does not support
Restrictions on setting temperatures (dual set points/single set point) are as follows.
(a) Monitoring setting temperatures from BMS
When sending temperature setting commands from BMS, note that different objects are used to set the setting temperatures
for dual set point indoor unit groups and single set point indoor unit groups. Refer to section 3.5 "Temperature setting objects"
in this manual for details.
(b) When dual set point indoor units and single set point indoor units are included in the same group
All indoor units in the same group will operate as single set point indoor units. Use single set point temperature setting object
(AV_xxxx10).
(c) When the BMS does not support the dual set point function
Enable "Old Model Compatibility Mode" of the BAC-HD150 Setting Tool. All indoor unit groups will be treated as single set
point unit groups because the BAC-HD150 will act as a single set point device.
Refer to section 8.2 "System Settings" in BAC-HD150 Setting Tool Instruction Book for details.
(d) When using PAC-YG50ECA
Systems with connections to PAC-YG50ECA and BAC-HD150 do not support the dual set point function. When using PAC-
YG50ECA, enable "Old Model Compatibility Mode" and "Expansion Controller Settings" on the BAC-HD150 Setting Tool. All
indoor unit groups will be treated as single set point unit groups. Refer to section 8.2 "System Settings" in BAC-HD150
Setting Tool Instruction Book for details.
(e) When using system controllers that do not support the dual set point function
When using system controllers that do not support the dual set point function, enable "Old Model Compatibility Mode" on the
BAC-HD150 Setting Tool. All indoor unit groups will be treated as single set point unit groups.
Refer to section 8.2 "System Settings" in BAC-HD150 Setting Tool Instruction Book for details.
(9) When connecting a superior system controller
Register the superior system controller as a System Controller from the BAC-HD150 Setting Tool. Refer to section 8.3
"Group settings" in the BAC-HD150 Setting Tool Instruction Book.
Also, register BAC-HD150 as a System Controller to the superior system controller.
(10) Use of AHC
BAC-HD150 does not support AHC. AHC cannot be controlled from BAC-HD150.
2000ms ( = 200ms  10 properties)
function is also supported.
the Setback function)
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Read_Property
time