9. TROUBLESHOOTING
IMS01J02-E4
185
Continued from the previous page.
Problem Probable
cause Solution
TX1 (data transmission) lamp and
RX1 (data reception) lamp are
flashed
alternately
Setting of PLC becomes write
inhibit
Setting of PLC is turned into
write enable (Write enable in
RUN, shift to monitor mode,
etc.)
Accesses outside the range of
memory address of PLC (wrong
setting of address)
Confirm the H-PCP-J module
settings and set them correctly
(Set unit address to become in
memory address range of PLC)
When request command is set in
“1: Setting,” setting error (bit 8 of
TIO status, ON) is become
Data rang error
Confirm the setting range of set
value and set them correctly
Even if "1: Setting" or "2: Set
value monitor" is set in request
command, transfer is not finished.
Request command does not return
to "0: Monitor"
Because response of the PLC
side is slow, H-PCP-J becomes
time-out by being waiting for
response from PLC.
Set PLC scanning time setting
(H-PCP-J module identifier: ST)
to any value more than twice as
long as the maximum scanning
time of PLC.
TX1 lamp, RD1 lamp flashes on
and off in turn, and it can be seen
to communicate normally, but
monitor value is not transferred to
PLC.
Because response of the PLC
side is slow, H-PCP-J becomes
time-out by being waiting for
response from PLC.
Set PLC scanning time setting
(H-PCP-J module identifier: ST)
to any value more than twice as
long as the maximum scanning
time of PLC.
If two or more units are
connected, no units after the
second unit are recognized.
Because response of the PLC
side is slow, H-PCP-J becomes
time-out by being waiting for
response from PLC.
Set PLC scanning time setting
(H-PCP-J module identifier: ST)
to any value more than twice as
long as the maximum scanning
time of PLC.
For the PLC scanning time setting (Identifier: ST), see
P. 76 (RKC communication), P. 134
(Modbus communication)
.
