Daikin DCS601C51 - Limitations of the Simple Interlock Function

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• Limitations of the simple interlock function
In the simple interlock function, setting the inconsistent input/output conditions is
allowed as described below.
* Priority of the interlock programs is determined in such a way that the lower program
has a higher priority and the output 2 has a higher priority than the output 1.
Example 1) When the interlock input point and the control target are same
Result : 1-00 cannot be initiated. (Even if it has been initiated, it should be stopped by
the interlock control function.)
Example 2) When the interlock input point and the control target are same but the
control items specify opposite operations
Result : The interlock output 2 with a higher priority is executed. (1-01 stops.)
The settings of the input/output conditions as described in the
example 3 below will cause a failure of the air-conditioning unit;
therefore never use these settings.
Example 3) When the interlock input point and the control output fall into a loop
Operation
(Reference)
Description
Input Condition
Any one or more
of the groups ON
Control Item
Stop
Interlock Output 1
Control Target
1-00
Input Condition
No detection
Control Item
–
Interlock Output 2
Control Target
–
Input Condition
Any one or more
of the groups ON
Control Item
Start operation
Interlock Output 1
Control Target
1-01
Input Condition
Any one or more
of the groups OFF
Control Item
Stop
Interlock Output 2
Control Target
1-01
Input Condition
Any one or more
of the groups ON
Any one or more
of the groups ON
Control Item
Start operation
Stop
Interlock Output 1
Control Target
1-01
1-00
Input Condition
Any one or more
of the groups OFF
Any one or more
of the groups OFF
Control Item
Stop
Start operation
Interlock Output 2
Control Target
1-01
1-00
1-00
Start
1-01
Start
1-00
Stop
1-01
Stop
<1-01 operation control>
Program 1
Interlock output 1
<1-01 stop control>
Program 1
Interlock output 2
Result : The interlock program is repeated endlessly. ?In the example
above, the air-conditioning units : 1-00 and 1-01 repeat
start/stop operations endlessly.
Interlock
Program
Number
Program 1
Interlock
input point
1-00
Interlock
Program
Number
Program 1
Interlock
input point
1-00
Interlock
Program
Number
Program 1
Program 2
Interlock
input point
1-00
1-01
Program 2
Interlock
output 2
Program 2
Interlock
output 2
<1-00
operation
control>
<1-00
stop
control>