Input Disconnection Detection Function - Omron CS1W-AD041-V1 Operation Manual

Analog Input Functions and Operating Procedures
6-6-4

Input Disconnection Detection Function

258
When an input signal range of 1 to 5 V (4 to 20 mA) is used, input circuit dis-
connections can be detected. The detection conditions for each of the input
signal ranges are shown in the following table.
Range
1 to 5 V
4 to 20 mA
The current/voltage level will fluctuate according to the offset/gain adjustment.
The input disconnection detection signals for each input number are stored in
bits 04 to 07 of CIO word n+9. Specify these bits as execution conditions to
use disconnection detection in the user's program.
Bit
15 14 13
Word n+9
For the CIO word addresses, n = CIO 2000 + (unit number x 10).
The conversion value during a disconnection will be 0000.
In the following example, the conversion value is read only if there is no dis-
connection at analog input number 1. (The unit number is 0.)
200904
Current/voltage
0.3 V max.
1.2 mA max.
12 11 10 09 08 07
The respective bit turns ON when a
disconnection is detected for a given
input. When the disconnection is
restored, the bit turns OFF.
Section 6-6
06 05 04 03 02 01
The conver-
MOV (021)
sion value in
2005
CIO word
2005 (input
D00001
number 1) is
read to
D00001.
00