User`s manual

Chapter 6 - GP RUN and Errors
GP-477R/577R Series User's Manual 6-5
When the GP will not communicate with the host PLC, follow the checklist
below to discover the origin of the problem and find a suitable solution.
Or, if an error message appears on the screen, check the error code (refer to
the Error Message section in this chapter) to find the appropriate solution.
From
No. Check Item OK Corrective Measure(s)
1
Unplug the GP’s Power Cord.
2
Is the GP’s Power Cord correctly
connected to the GP?
Connect the power terminals
correctly.
3
When using an RS422 cable:
Is the terminating resistor
correctly attached?
Attach the resistor correctly.
A terminating resistor’s usage,
placement location, and resistance
value will vary according the PLC
used.
PLC Connection Manual
4
Was the correct [PLC Type]
selection made in the Screen
Creation software?
Re-designate the PLC type.
Operation Manual
Connection Manual
5
Are any tag address settings
incorrect?
Correct the incorrect settings.
Operation Manual
Tag Reference Manual
If the problem with the settings
cannot be found, ((S)).
6
Unplug the GP’s Power Cord. Disconnect all other cables connected to the GP.
7
Reconnect the GP’s Power Cord and
enter the GP’s OFFLINE mode.
Ch. 4 - OFFLINE Mode
8
Are all the SET UP SIO area’s
settings correct?
Path: [MAIN MENU] to [SET UP I/O]
5.4.1 SET UP SIO,
PLC Connection Manual
9
Is the result of the [COMMUNICA-
TION CHECK] OK?
Path: [MAIN MENU] to [SELF-
DIAGNOSIS] menu
To perform this check a special
cable is required.
6.3.2 Self-Diagnosis
Details
If not OK, ((H))
10
Unplug the GP’s Power Cord and check
that the Data Transfer cable is
connected correctly.
11
Reconnect the GP’s Power Cord and
transfer normal screen data to the GP.
Operation Manual
12
Unplug the GP’s Power Cord and unplug
the GP’s Data Transfer cable. Next,
connect the host (PLC)’s data transfer
cable to the GP.
Be sure only the GP’s Power Cord
and the PLC’s data transfer cable
are connected. 3.2
Wiring Cautions, PLC Connection
Manual
13
Reconnect the GP’s Power Cord. Is
data transfer now possible?
If it is not possible, please check
that the PLC’s data transfer settings
are correct. ((S))
14
Unplug the GP’s Power Cord and check that all cables are correctly connected
to the GP. Next, reconnect the GP’s Power Cord.
15
Did performing the above actions
solve the problem?
If not, try to confirm which cable is
causing the problem. ((H))
Reference
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Reference
Reference
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Reference
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Reference
Reference
Reference
(B) "No GP/Host(PLC) Communication" Checklist