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Appendices
NX-series Communications Interface Units User’s Manual (W540)
A-4 Programming Samples
A
A-4-1 Items Common to all Programming Samples
A-4 Programming Samples
This appendix provides programming samples in the ST language for the communications master to
use a CIF Unit to perform communications with a serial communications device.
It is assumed that the CIF Unit is connected to an Et
herCAT Coupler Unit with an NJ/NX-series CPU
Unit as the communications master.
The following three programming samples are provided.
• Restarting CIF Unit Ports
• Sending Data
• Receiving Data
• When creating a program with reference to the programming samples, Restarting CIF Unit
Ports and Sending Data, do not run them concurrently.The desired Output SID Response
may not be obtained, resulting in a failure to complete the port restart process.
• Refer to the NJ/NX-series Instructions Reference Manual (Cat. No. W502) for the sample
programming when the serial communications instructions for the CIF Units are used.
This section describes the items that are the same in all three programming samples.
The following system configuration is used.
A-4-1 Items Common to all Programming Samples
System Configuration
Item Specification
Communications master NJ501-1500
Communications Coupler Unit NX-ECC201
CIF Unit NX-CIF101
NX Unit number of CIF Unit 1
Serial communications device
NJ-series CPU Unit
NJ501-1500
EtherCAT Coupler Unit
NX-ECC201
NX-CIF101
NX Unit number 1
EtherCAT
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