Honeywell VRX180 Manuale Utente

Performs math on up to 8 inputs using a single operator.  Output is CVn OV.  Division by 0 is indicated 
by CVn OV’s displayed value flashing 0. 

Table 4-22 describes the Math prompts. See Table 4-2 for additional prompts. 

INPUT A - INPUT H 

OFF, analog parameter, 
number. 

Enter up to 8 input sources.  

If connecting to an upstream loop, that loop output (LP# OV) 
MUST be INPUT A (see Feedback). 

OUTPUT LOW LIMIT 

OUTPUT HIGH LIMIT 

Enter limits 

Displayed output value will be clamped and will flash when 
these limits are exceeded. 

OPERATOR 

ADD, SUBT, MULT, DIV, 
ABSVAL, SQRT and 
STDDEV. 

1. Input A OPERATOR  Input B OPERATOR...Input H 

 

where OPERATOR is one of these: 

 

add, subtract, multiply, or standard deviation 

 

(Standard Deviation uses all inputs.) 

 

Example: Input A minus Input B minus ...Input H. 

2. OPERATOR  Input A 

 

where OPERATOR is absolute value or square 

 root. 

3. Input A OPERATOR  Input B 

 

where OPERATOR is divide. 

Note: Inputs 3-8 are not used in division. 

FEEDBACK 

OFF, analog parameter, 
number 

Select LP# BC or AO# BC to propagate the back calculation 
(BC) value from a downstream loop or AO.  Also, program 
the upstream loop's feedback with this Math CV's back 
calculation value (CV# BC).  You MUST program this CV's 
feedback to NONE if this CV is not used as part of a control 
loop output configuration (Figure 4-4).  If it is part of a loop 
configuration, the math operator cannot be ABSVAL, SQRT, 
or STDDEV. 

 

BC

PID

AO

PID

FB

INP 1

MATH
CV

BC

FB

OR