Programming Example To Detect Valid I/O Process Data - Omron CJ1W-ECT21 Operation Manual

A-2 Programming Example to Detect Valid
I/O Process Data
The following programming example should be used to confirm that I/O process data is valid for an
EtherCAT Slave Unit mounted to an NJ-series CPU Unit.
This example uses the Unit Status 1 and Slave Status 2 device variables. Refer to 3-2 Device Variables
for CJ-series Unit (Status) on page 3-9 for details of the Unit Status 1 and Slave Status 2 device vari-
ables. The unit number of the EtherCAT Slave Unit is set to 01 for this example.
Device variable
*_UnitErr
*_InDataValid
*_OutDataValid
*_LKSta1
CJ-series EtherCAT Slave Units Operation Manual for NJ-series CPU Unit (W542)
Name
Unit Error
Input Data Valid
Output Data Valid
IN Port Link Status
Description
Indicates EtherCAT Slave Unit operating errors.
Indicates that the Unit is processing transmit by process data
communication. Data is valid and usable for control.
Indicates that the Unit is processing receive by process data
communication. Data is valid and usable for control.
Indicates when a link on the IN port is established with
another device.
Appendices
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