gefran 2850T, Инструкция по использованию и установке, Страница: 70 / 166

68
4. CONFIGURATION
80703B_MHW_2850T/3850T_02-2019_ENG
F0 Function
(Time equivalent to the exposur
e time at 121.11 ° C (249.99 °F) applied to a pr
oduct in the sterilisation pr
ocess expr
essed in minutes)
Diagram
Formal language
Description
Inputs
Outputs
Timer
no.
type
no.
type
Out = F0
F0 is the exposur
e time equivalent
to 121.11° C (249.99 °F) of the actual exposur
e time at a variable
temperatur
e calculated for an ideal
micr
o or
ganism with a destruction
temperatur
e coefficient equal to
10° C.
Input A
= Enable F0 calculation.
(ENABLE)
Input B
= Actually r
ead tempera
-
tur
e. (TX)
Input C
= Refer
ence temperatur
e
in the selected unit of measur
e (°C
or °F).
Input D
= Distribution temperatur
e
coefficient in the selected unit of measur
e (° C or °F), corr
esponds
to the temperatur
e change to vary
the r
eduction time by a factor of
10. (Z)
4
Only
digital variables ar
e admitted on input
A such as: •
Digital inputs/outputs
•
Merker
•
Retain Merker
•
System functions (*)
1
Only
analog variables ar
e admitted such as:
•
Analog outputs
•
Register
•
Retain Register
•
Real
•
Retain Real
No
Analog variables ar
e admitted on inputs B,
C and D such as: •
Analog inputs/outputs
•
Register
•
Retain Register
•
Real
•
Retain Real
•
Constant values
(*)
For the list of functions, see paragraph “13.1. System variables” on page 161.
NB: With input A (ENABLE) = F
ALSE, the output value r
emains fr
ozen at the last calculated F0 value with input A (ENABLE) = TRUE.
On the rising edge of the A input, the output is r
eset.
With input A (ENABLE) = TRUE the calculation of F0 is on.