User`s manual
INP-TN5A0202-E 7-5
7.1 Error procedure
Troubles Causes Solutions
Only certain connected modules
cannot be read out data
The applicable module is accessing
to non-supported MODBUS address
Check the MODBUS address supported by
the applicable module
Access beyond the applicable module
device number (Device size over)
Modify the parameter setting within the
applicable device size
Incorrect St. No. setting of the
applicable module
Set the applicable module station number
correctly
The unit failure Replace the applicable module
Wrong data value read out to PLC
device
PWR indicator shows the red light:
Short PLC response monitoring time
Set longer PLC response monitoring
time, or increase Number of retry times
5-15
Duplication of PLC device memory
Modify the setting no to duplicate the device
types
and the start address of the Setting/
Monitor area
5-5, 5-8
Device memory is overwritten on the
PLC sequence program
Check the device used on the PLC
sequence program, modify the setting not
to overwrite the device memory (Check the
duplicating part using the device list for use
etc. by PLC GX Developer)
Duplication of the monitor area
device memory setting of PLC with 1:
N connection
Make the monitor area device memory
setting of each programless communication
module not to be duplicated
Monitor area response fl ag (in the
8000hs): Abnormal response status
Invalid value was written to the
control/event module
Check and modify the value set to the data
fi eld for the setting area
PWR indicator:
GREEN blinking
during 1:N connection
(0.1-sec inter-cycle)
The power of PLC is OFF Turn on PLC
Connection failure
Check the RS-232C/RS-422/RS-485
connection between the DIP SW 1, SW2
(selection of RS-232C/RS-422/RS-485) of
programless communication module and the
PLC
Check the signal conductor between the
programless communication module and the
PLC
Connecting cable failure
Check the signal conductor state between
a programless communication module and
PLC, and also check the connecting cable
break
Check if the signal conductor between a
programless communication module and
PLC is correct