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Advanced Function Instruction
7 -11
FUN32
ADCNV
CONVERTING THE RAW VALUE OF 4
~
20MA ANALOG INPUT
(
ADCNV
)
FUN32
ADCNV
Pl :
N :
EN
Ladder symbol
32.ADCNV
S :
D :
F/T
Operation Control
14/12 - Bit Selection
HR
IR
ROR
DR
K
Range
Ope-
rand
R0
∣
R3839
R3840
∣
R3903
R5000
∣
R8071
D0
∣
D4095
Pl
0~1
S
○
○
○
○
N
○
○
○
1~64
D
○
○
*
○
Pl
:
0, the polarity setting of analog input module is at unipolar
position
:
1, the polarity setting of analog input module is at bipolar
position
S
:
Starting address of source registers
N
:
Quantity of conversion (In Word)
D
:
Starting address of destination registers
S, N, D may associate with V
、
Z
、
P0~P9 index register to serve
the indirect addressing application.
●
When the analog input is 4
~
20mA, the analog input module is one of the solution to get this kind of signal,
but the input span of the analog input module is 0
~
20mA (Setting at 10V
、
Unipolar), however there will exist
the offset of the raw reading value; this instruction is applied to eliminate the offset and convert the raw
reading value into the range of 0
~
4095(12-bit) or 0
~
16383(14-bit), it is more convenient for following
operation.
●
When execution control "EN"=1, it will execute the conversion starting from S, length by N, and then store
the results into the D registers.
●
This instruction will not act if invalid length of N.
●
When the input
〝
F/T
〞
=0, it assigns the 12-bit analog input module; while
〝
F/T
〞
=1, it assigns the 14-bit
analog input module.
Example
:
M0
32.ADSNV
EN
N :
D :
S :
F/T
P1 :
0
R3840
R500
6
Description
:
When M0 is ON, it will perfom 6 points of conversion starting from R3840, where the offset of 4
~
20mA raw reading value will be eliminated, and the corresponding value 0
~
4095 will be stored into
R500
~
R505.
S D
R3840
-
1229
R500
0
(4 mA)
R3841
409
R501
2047
(12 mA)
R3842
2047
R502
4095
(20 mA)
R3843
-
2048
R503
0
(0 mA)
R3844
-
2048
R504
0
(0 mA)
R3845
-
2048
Ö
R505
0
(0 mA)
Содержание FBs Series
Страница 78: ...MEMO ...
Страница 111: ...4 6 X0 X1 Node A Y0 Y1 Node B differential down Incerse differential up t Scan time Inverse t t ...
Страница 141: ...Basic Function Instruction 6 16 FUN 2 SKP SKIP START FUN 2 SKP Y2 Y1 Y0 T201 10S X0 X1 X2 0 10 0 ...
Страница 305: ...MEMO ...
Страница 348: ...MEMO ...