Step 2: Selecting System Management Parts; M-Net System Structure; Concept Of The System Controller - Mitsubishi Electric G-50A Technical Manual

5. Step 2: Selecting System Management Parts

5.1 M-NET system structure

There are cases in which other System Controllers (SC) besides model G-50A can be run on the G-50A
system structure.
In order to do so, the following outlines a number of rules to be observed for system management.

5.1.1 Concept of the system controller

The G-50A is always the host system of a self-controlling system structure.
In addition, for a SC enabling the setting to permit prohibition of the local remote controller operation,
please set up the system in such a way the setting is done with 1 SC unit for the remote controller in
question.
(1) Significant system controller and insignificant system controller
When an air condition system is supposed, the system controller (SC) to control the entire operation
system connection information is positioned as the significant SC. While, the insignificant SC means the
SC to control sir conditioners by receiving the operation system connection information from the
significant SC.
Therefore, the initial settings including group setting and so forth may be made basically only on the
significant SC, and there is no need to carry out the group setting on the insignificant SC.
Priority of the significant SC is determined according to the functions of the SC (the number of units to
control, the number of groups to control, etc.).
G-50A is the most multifunctional type in the system, accordingly it always becomes the significant SC.
(Significant SC priority)
G-50A > PAC-SF44SRA > PAC-YT34STA > PAC-YT40ANRA > PAC-SC30GRA > PAC-YV02LMAP
(2) SC enabling the prohibition remote controller setting
A SC able to set the prohibition of operation using a remote control, is called a "SC enabling setting of
the remote controller operation prohibition."
Please make sure, the number of SC units enabling the setting of the remote controller operation
prohibition, is one always one unit for every remote controller.
Normally, in the G-50A system, the G-50A is the SC enabling the setting of the remote controller
operation prohibition. However, in the case you want to disable operation of the remote controller using
another SC (lower SC), please select "Disable the setting from this unit to prohibit remote control"
during initial set-up.
For details, please refer to the operation manuals of each SC.
20
Disable the
prohibit remote
Upper SC
controller setting
G-50A
SC enabling the
Slave SC
prohibit remote
controller setting
System
remote controller
Power supply unit
(PAC-SC50KUA)
Figure 5-1 System controller concept