Data Format(Input 4 Words) - Toshiba V Series User Manual

A/D Conversion

Data Format(Input 4 words)

• 1-5V/4-20mA
XW
• ±10V
XW
Supplementary
In the voltage input specification, data bits are not set to 0 when the circuit between input pins is
open (become indeterminate at 0 to 250V). Therefore, short-circuit the input pins for unused
channels.
6F8C0836
Digital Value
4000
3000
2000
1000
4 10
20(mA)
Analog Value
(a) 4-20mA range : D=250 × A-1000
(b) 1-5V range : D=1000 × A-1000
(c) ± 10V range : D=200 × A
F E D C B A 9 8 7 6 5 4 3 2 1 0
B * * * D D D D D D D D D D D D
D: Data bit (12 bits)
0-4000 (H0000-H0FA0)
B: External line abnormal detection bit
0= Normal
1= Abnormal
(Current input line open, or external power OFF)
*: Always 0
F E D C B A 9 8 7 6 5 4 3 2 1 0
S S S S D D D D D D D D D D D D
S: Sign bit
0= Positive
1= Negative
D: Data bit (11 bits)
-2000 – 2000 (HF830 - H07D0)
2's complement if negative
Digital Value
(a)
4000
3000
2000
1000
-10 -5 0 1
-1000
-2000
D = Digital value
A = Analog value
2.3 I/O Module Specification
(b)
(c)
5
10(V)
Analog Value
83
2