SHD_EEI1: Shading energy efficiency indicator1, rule 1

Block SHD_EEI1 (FB803) calculates whether present shading supports heat demand to the room and, thus, meets the condition for energy efficiency. The results are pending on the output.

Rule 1: Monitor blinds position at "Load".

Principle of operation

The block calculates at room load condition = Load (heat demand), whether manually changing the blinds position still permits solar radiation to the room (heat support). The energy efficiency condition is evaluated and outputted.

IF			THEN
Room load condition	Solar radiation	Blinds position	Energy efficiency condition
"Load" (heat demand): [RThLdCndPrVal] = 1	Available: [SolRdnCndPrVal] >= 2	Down and closed: [BlsCmdPrgsValh] > [BlsHgtClsdDsgn] AND [BlsCmdPrgsVala] > [BSlatsAglClsdDsgn]	[Out] = 1
	Available: [SolRdnCndPrVal] >= 2	Up: [BlsCmdPrgsValh] < [BlsHgtOpnDsgn]	[Out] = 0
	None: [SolRdnCndPrVal] =1	-
"Unload" (refrigeration demand) [RThLdCndPrVal] = 2	-	-
Blinds command present priority [BlsCmdPrPrio] <> 13

The following notes may help if the Green Leaf indication does not meet expectations:

The Green Leaf indication is calculated from the results of energy efficiency of the disciplines used (HVAC, shading, lighting). Comply with the priorities of individual rules.
Individual energy efficiency results are calculated based on user intervention as well as room conditions (outside air temperature, solar radiation, room loads, setpoints, ...).
Changing room conditions can change independent of user interventions of the indicated energy efficiency results.

Example:
The blinds are manually opened, as the room load condition was "Load".
Result: SHD_EEI1: OUT = 0 (energy efficiency condition is met)
The room load condition changes to "unload" since the outside temperature has increased in the interim. In this case, open blinds prevent heat protection against solar radiation. Room load condition "unload" is also monitored and evaluated by block SHD_EEI2.
Result: SHD_EEI2: OUT = 1 (energy efficiency condition is not met). The Green Leaf indication changes to brown (no energy efficient operating state/condition).
Does not impact the result from SHD_EEI1: OUT = 0 (energy efficiency condition is met).

Inputs

Pin	E	Description
BlsCmdPrgsValh		Progress value height for blinds command
BlsCmdPrgsVala		Progress value angle blinds command
BlsCmdValid		Valid blinds command
RThLdCndPrVal		Thermal room load condition present value 1 (Load) 2 (Unload)
RThLdCndValid		Valid thermal room load condition
SolRdnCndPrVal		Condition solar radiation present value 1 (None) 2 (Low) 3 (Medium) 4 (High)
SolRdnCndValid		Valid solar radiation condition
BlsCmdPrPrio		Blinds command present priority
BlsHgtClsdDsgn	pax	Designed blinds height closed
SlatsAglClsdDs	pax	Designed slat angle closed

Outputs

Pin

Description

Out

Output.

0 (No)

1 (Yes)

Input values

Pin	Description	Data type	Standard value	Engineering unit or text group	Min.	Max.
BlsCmdPrgsValh	Progress value height for blinds command	REAL	0.0	%	0.0	100.0
BlsCmdPrgsVala	Progress value angle blinds command	REAL	0.0	%	0.0	100.0
BlsCmdValid	Valid blinds command	BOOL	0	False, True
RThLdCndPrVal	Thermal room load condition present value	INT	2	Load, Unload	2	1
RThLdCndValid	Valid thermal room load condition	BOOL	0	False, True
SolRdnCndPrVal	Condition solar radiation present value	INT	1	None, Low, Medium, High	1	4
SolRdnCndValid	Valid solar radiation condition	BOOL	0	False, True
BlsCmdPrPrio	Blinds command present priority	INT	16	BA present priority for SystemOne	0	17
BlsHgtClsdDsgn	Designed blinds height closed	REAL	90.0	%	0.0	100.0
SlatsAglClsdDs	Designed slat angle closed	REAL	75.0	%	0.0	100.0

Output values

Pin	Description	Data type	Standard value	Engineering unit or text group	Min.	Max.
Out	Output.	BOOL	0	No, Yes

Process response

Standard (see General rules and information).

Troubleshooting

Standard (see General rules and information).