Omron NX-AD series - Load Rejection Output Setting

7 Analog Output Units
7 - 14
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
This function maintains a safe output status by performing the preset output operations when the
Analog Output Unit connected to the CPU Unit cannot receive output data from the CPU Unit due to an
NX bus error or CPU Unit watchdog timer error
In Slave Terminals, this function sets the value to be output when Analog Output Units cannot receive
the output set value from the Communications Coupler Unit due to a host error on the Communications
Coupler Unit or an error on the NX bus.
Set the output value from any of the following for each output when an error occurs.
z Two-point Output Units
*1. The descriptions of Ch Hold Value Setting are as follows.
7-5-3 Load Rejection Output Setting
Purpose
Details on the Function
Setting description Meaning
Set value
Output range
-10
to +10 V
Output range
4
to 20 mA
Hold Last State Hold and output the value immediately before the
error occurred.
Hold Hold
Low Limit Output the lower limit of each output range. -11 V 3.2 mA
High Limit Output the upper limit of each output range 11 V 20.8 mA
User Count Output the user-specified value. User specified
value
User specified
value
Zero Count Output the analog value if the output set value of
each output range is 0 (default).
0 V 4 mA
Setting name Description
Default
value
Unit
Ch1 Hold Value Setting
Set the value to output at load OFF.
*1
4 ---
Ch1 User-specified Value
Setting
Set the value to output when the Load OFF Out-
put Setting is set to output the user specified
value.
0 ---
Ch2 Hold Value Setting
Set the value to output at load OFF.
*1
4 ---
Ch2 User-specified Value
Setting
Set the value to output when the Load OFF Out-
put Setting is set to output the user specified
value.
0 ---
Set value Setting description
0 Hold Last State
1 Low Limit
2 High Limit
3 User Count
4 Zero Count