Nor-Cal SDC15 Controller - Manual (Page 55)

5-5
■ PV input range low limit/high limit
When the PV input type is L (DC voltage/DC current), the scaling of the PV input
can be set.
• When the PV input type is T (thermocouple) or R (RTD), the setting item can be
displayed, but the setting cannot be made.
• When the PV input type is L (DC voltage/DC current), the display and setting
can be made.
The following describes the relationship between the PV input and PV when
setting up the range low limit and high limit.
■ PV ratio and PV bias
The PV ratio and PV bias can be set to compensate the PV.
• Details of PV ratio and PV bias controls
Assuming that the control input is PVin, control result is PVout, PV ratio is RA,
and PV bias is BI, the following control formula is obtained:
PVout = (PVin X RA) + BI
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Item (Setting display/bank) Display Contents Initial value User level
PV input range low limit
(Setup setting/Setup bank) When the PV input type is "L", the following
contents apply:
-1999 to +9999 (no decimal point)
-199.9 to +999.9 (1 digit after decimal point)
-19.99 to +99.99 (2 digits after decimal point)
-1.999 to +9.999 (3 digits after decimal point)
When the PV input type is "T" or "R", the
range low limit and high limit values selected
using the PV input range type are used. When the PV input
type is "L", the initial
value is "0". Simple,
Standard,
High function
PV input range high limit
(Setup setting/Setup bank) When the PV input
type is "L", the initial
value is "1000".
PV
-10 0 100110
Input (%)
Low limit
Low limit < High limit Low limit > High limit
High limit
PV
-10 0 100110
Input (%)
Low limit
High limit
Item (Setting display/bank) Display Contents Initial value User level
PV ratio
(Parameter
setting/Parameter bank) 0.001 to 9.999 1.000 Standard,
High function
PV bias
(Parameter
setting/Parameter bank) 0U Simple,
Standard,
High function -1999 to +9999 U