
11.TROUBLESHOOTING B-63945EN/02
- 592 -
- Connection of cables
As in the example shown on the previous page, I/O Link cables are
used to connect JD1A (JD51A) and JD1Bs.
JD1A (JD51A) represents an upper unit while JD1B represents a
lower unit.
Check that the cables are connected correctly.
- Connection of ground wires
Check that the ground wires are connected and are not loose.
- Connection of I/O signals
Check that the input/output signals to be connected to each I/O device
are connected correctly.
For operator's panel I/O modules and for connector panel I/O modules,
also check that the 0 V or +24 V input signal is connected to the
common pin and that the +24 V output signal is connected to the DO
common pin.
- I/O Link allocation
Check that I/O Link allocation has been performed correctly.
From the function key
SYSTEM
menu, select [PMC CONF], [MODULE],
and [EDIT] in that order. The allocation edit screen appears.
After editing allocation, be sure to write the sequence program onto
the flash ROM using the PMC data I/O screen. Otherwise, the
changes will be lost when the power is turned off.