Omron NX-AD series User Manual

6 Analog Input Units
6 - 12
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
6-5 Function
This section describes the Analog Input Unit functions.
Refer to the specifications of each model in A-1 Data Sheet on page A-2 for details on the functions.
6-5-1 List of Analog Input Unit Functions
Function name Description Reference
Free-Run Refreshing 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.
5-2-4 Free-Run
Refreshing on
page 5-8
Synchronous I/O Refresh-
ing
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.
5-2-5 Synchro-
nous Input
Refreshing on
page 5-12
Selecting Channel To Use This function omits the conversion processing for unused
inputs. It is used to reduce the conversion cycle for its own
Unit.
6-5-2 Selecting
Channel To Use on
page 6-13
Moving Average 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.
6-5-3 Moving Aver-
age on page 6-17
Input Disconnection
Detection
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.
6-5-4 Input Discon-
nection Detection
on page 6-23
Over Range/Under Range
Detection
This function detects when the input signal exceeds the range
for which conversion is possible.
6-5-5 Over
Range/Under
Range Detection
on page 6-24
User Calibration This function corrects offsets in the converted values that
occur due to the deterioration of the NX Units and calibrate the
Units.
6-5-6 User Calibra-
tion on page 6-25

Omron NX-AD series Specifications

General

Brand	Omron
Model	NX-AD series
Category	I/O Systems
Language	English