Input Process Functions; Model Without Carbon Potential (Cp) Compensation - Honeywell DCP552 Mark II User Manual

5 - 4

Input Process Functions

This section uses diagrams to describe input processes.

Model without carbon potential (CP) compensation

Analog input 1
Setting: setup data C01
Input range type
A/D conversion
(For resistance temperature detector)
Wiring resistance compensation
(For thermocouple)
Cold junction compensation
Setting: setup data C07, C10
(For DC current or voltage)
Square-root extraction
Setting: setup data C08, C09
(For DC current or voltage)
Upper and lower limit value scaling
Setting: setup data C04 to C06
(For thermocouple or resistance temperature detector)
Temperature unit range
Setting: setup data C02, C03
Upper and lower limit alarm
Equalizer (approximation
Setting: setup data C30
by linearization table)
Setting: variable parameter PA13
Bias
Setting: program setting PV shift item
PV shift
Setting: variable parameter PA12
Digital filter
PV (PV1)
NOTE
Correction point no.10
Correction point no. 9
Correction point no. 8
Correction point no. 7
Correction point no. 6
Correction point no. 5
Correction point no. 4
Correction point no. 3
Correction point no. 2
Correction point no. 1
Variable parameters PA51 to PA70
The use of equalizer (approximation by linearization table) is shown in the figure
below.
When a sensor with curved characteristics is used to measure PV, a linearization
table is used.
PV input (sensor output)
No.3
No.2
No.1
Analog input 2
Setting: setup data C11
Input range type
A/D conversion
(For resistance temperature detector)
Wiring resistance compensation
(For thermocouple)
Cold junction compensation
Setting: setup data C17, C20)
(For DC current or voltage)
Square-root extraction
Setting: setup data C18, C19
(For DC current or voltage)
Upper and lower limit value scaling
Setting: setup data C14 to C16
(For thermocouple or resistance temperature detector)
Temperature unit range
Setting: setup data C12, C13
Upper and lower limit alarm
Equalizer (approximation
Setting: setupdata C30
by linearization table)
Setting: variable parameter PA23
Bias
Setting: PV shift item in program setting
PV shift
Setting: variable parameter PA22
Digital filter
PV2
No.6
No.5
No.4
: (right facing arrow) indicates negative correction.
: (left facing arrow) indicates positive correction.
: (bullet) indicates 0 correction.
Chapter 5. FUNCTIONS
Variable parameters PA71 to PA90
No.10
No.9
No.8
No.7
Actual PV
5-29