6-4 Troubleshooting
6-4
6-7
■
Host communications Check Flowchart
Start
Specify the correct
communication settings
and node ID.
Modify the host program
or replace the host
device
.
Error response 7C
Is the host operating
normally?
Issue TS Command
from the host.
OK
The lit NORML LED
or ERR LED is
turned off.
The response has
been received.
YES
YES
YES
NO
NO
YES
Are the communication
conditions, command
frame, node ID OK
?
Are the connector’s pin
assignments for the
communication cables OK?
Correct the pin
assignments of the
connectors.
The Reader/Writer
may have failed.
Refer to section 6-4-2 Check
Items for Each Response Code.
NO
YES
NO
YES
NO
NO
