Hitachi S10VE, User Manual

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13. Troubleshooting
13-84
13.2.3 Remote I/O communication troubleshooting
This section describes how to perform remote I/O communication troubleshooting.
13.2.3.1 Troubleshooting procedure
Use the MCS of BASE SYSTEM/S10VE (see 8.4.6.4 RAS menu: MCS ) to check the status of the system
register (registered station, timeout station) and the LED status of the station module and remote I/O optical
adapter, and then perform troubleshooting.
(1) Procedure for PI/O unit troubleshooting
If the sent and received data does not match the relationship between input and output, perform
troubleshooting with respect to the PI/O modules and station modules installed in the PI/O unit.
Figure 13-20 shows the troubleshooting procedure.
Figure 13-20 Troubleshooting procedure for the PI/O unit
Start
The sent and received data does not match the
relationship between input and output.
See 13.2.4 to perform troubleshooting for the
PI/O module.
The sent and received data does not
match the relationship between input
and output at one point for a particular
Yes
No
No
Yes
Is the station module LED on?
No
Yes
OK
Correct the settings (ST.No. settings, FIX/FREE
settings, and point settings).
Was recovery possible?
Yes
No
Finish
See the following pages to perform remote I/O
line troubleshooting.
Replace the station module.
Among the PI/O modules installed in the
PI/O unit, the sent and received data
does not match the relationship between
input and output for one particular PI/O
module (or multiple PI/O modules).
Check the station module settings
(ST.No. settings, FIX/FREE settings,
and point settings).
Not OK