List Of Functions; Analog Input Units - Omron NX-AD series User Manual

1 Features and System Configuration
1-4

List of Functions

This section provides an overview of functions that Analog Input Units and Analog Output Units have.
Refer to the specifications of each model in A-1 Data Sheet on page A-2 for details on the functions.
1-4-1

Analog Input Units

Function name
Free-Run Refreshing
Synchronous I/O Refresh-
ing
Selecting Channel To Use
Moving Average
Input Disconnection
Detection
Over Range/Under Range
Detection
User Calibration
1 - 12
With this I/O refreshing method, the refresh cycle of the NX
bus and the I/O refresh cycles of the NX Units are asynchro-
nous.
With this I/O refreshing method, the timing to read inputs or to
refresh outputs is synchronized on a fixed interval between
more than one NX Unit connected to a CPU Unit.
In addition, with this I/O refreshing method, the timing to read
inputs or to refresh outputs is synchronized on a fixed interval
between more than one NX Unit on more than one Slave Ter-
minal.
This function omits the conversion processing for unused
inputs. It is used to reduce the conversion cycle for its own
Unit.
This function uses the average value of inputs of the set time
as the converted value. When the input value fluctuates fre-
quently due to noises, averaging can be used to obtain a sta-
ble converted value.
This function can be used only for Free-Run refreshing.
This function detects disconnections of the analog input signal
lines. It can be used only for models with an input range of 4 to
20 mA.
This function detects when the input signal exceeds the range
for which conversion is possible.
This function corrects offsets in the converted values that
occur due to the deterioration of the NX Units and calibrate the
Units.
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
Description Reference
5-2-4 Free-Run
Refreshing on
page 5-8
5-2-5 Synchro-
nous Input
Refreshing on
page 5-12
6-5-2 Selecting
Channel To Use on
page 6-13
6-5-3 Moving Aver-
age on page 6-17
6-5-4 Input Discon-
nection Detection
on page 6-23
6-5-5 Over
Range/Under
Range Detection
on page 6-24
6-5-6 User Calibra-
tion on page 6-25