2-5
Section
Using the Functions
26
The input disconnection detection signals for each input number are stored in
bits 00 to 07 of IR word n+9. Specify these bits as execution conditions in order to
use disconnection detection in the user’s program.
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Bit
Input 8
Input 7
Input 6
Input 5
Input 4
Input 3
Input 2
Input 1
Word n+9
The respective bit turns ON when a
disconnection is detected for a given
input. When the disconnection is
restored, the bit turns OFF.
For the IR word addresses, n = 100 + 10 x unit number.
For Units #A to #F (10 to 15), n = 400 + 10 x (unit number – 10).
The conversion value during a disconnection will be 0000.
Disconnection detection is performed on the input voltage/current data that has
been converted into digital values. Therefore, detected values may be different
from those shown in the above table due to offset and gain adjustments, etc.
In the following example, the conversion value is read only if there is no discon-
nection at analog input number 1. (The unit number is 0.)
MOV(21)
101
DM0001
10900
The conver-
sion value in
IR word 101
(input number
1) is read to
DM 00001.
