2WA/2NJ/2RK
7-547
U01721/E01721
U01800/E01800
U01810/E01810
Step Check description Assumed cause Measures Reference
1 Resending The communication was
interrupted because there
is no communication
speed commonly used
with the destination unit.
Resend.
2 Checking the transmit start
speed
Line condition is poor.
(Destination unit)
Execute U630 [TX Speed] to
reduce the transmit start
speed. Then, resend the
data.
U630 Exe-
cution
3 Changing the initial value Line condition is poor.
(Own machine)
Change the default value of
the transmit start speed by
executing U630 [TX Speed].
U630 Exe-
cution
Step Check description Assumed cause Measures Reference
1 Request for resending A communication error
occurred in phase 2 (line
probing).
Request the destination unit
to resend the data after
reducing the transmit start
speed.
2 Changing the initial value Line condition is poor.
(Own machine)
Change the reception speed
by executing U630 [RX
Speed].
U630 Exe-
cution
Step Check description Assumed cause Measures Reference
1 Request for resending A communication error
occurred in phase 3 (pri-
mary channel equivalent
device training).
Request the destination unit
to resend the data after
reducing the transmit start
speed.
2 Changing the initial value Line condition is poor.
(Own machine)
Change the reception speed
by executing U630 [RX
Speed].
U630 Exe-
cution