Huawei SmartDC V100R021C10 User Manual page 241

ECC800 Data Center Controller
User Manual
Issue 04 (2021-10-09)
– A complete linkage logic consists of input 1, an operator, input 2, and
output. After the calculation of the specified operator is performed on
input 1 and input 2, the corresponding output action can be performed if
the calculation result is true.
– A record of linkage logic must be added to a logical group. Multiple
records of linkage logic can be added to a logical group. Multiple records
of linkage logic in a logical group jointly complete a complex linkage
control.
– Linkage logic terms are described as follows:
Table 6-44 Linkage logic terms
Level-1
Category
Input 1/
Input 2/
Output
Operator
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Level-2 Description
Categor
y
Signal Provides some basic real-time parameters,
status parameters, and alarms as the input
data for linkage. Provides some setting
signals for linkage output.
Register For some complex logic, the operation result
needs to be temporarily stored in the register,
or the operation result temporarily stored in
the register may be used as an input of
another logic.
Constan Dedicated for input 2; used when a constant
t needs to be calculated for input 1.
Relay Dedicated for output; can be used to control
the contact status of the DO port on the
board.
AND Both input 1 and input 2 meet requirements.
OR Either input 1 or input 2 meets requirements.
NOT Input 1 is invalid, and input 2 is reversed.
> Input 1 is greater than input 2.
NOTE
Hysteresis indicates that the output action is
delayed to prevent the output action from
changing continuously due to value fluctuation.
For example, if the linkage logic "the air
conditioner starts when the temperature is higher
than 27°C and the hysteresis is 3" is configured,
the air conditioner starts when the temperature is
higher than 27°C and does not start when the
temperature drops to 24°C.
< Input 1 is smaller than input 2.
6 Feature Description
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