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30 CIMPLICITY® Display Station Touch Display: IC752CTD400/450
–
March 1998 GFK-1425B
Communications
PLC/CPU Connection
Symptom Possible Causes Solution
CIMPLICITY does not
communicate with a PLC that has
been autoconfigured
(AUTOCONFIG/DEFAULT/I/O
error).
The system is attempting to
communicate with a 90-30 PLC
using the SNP driver and a
CIMPLICITY project.
1. With the PLC powered up and
connected to the Display Station,
establish communication between
the Display Station and PLC via
the 90-30 SNP driver.
2. Using a Hand-Held
Programmer, toggle the Default
I/O (Enable or Disable)
configuration parameter for the
CPU. Communications between
the Display Station and the PLC
will be stopped. (Communications
are stopped when you toggle from
Enable to Disable, or vice versa.)
3. Power cycle the PLC.
Communications between the host
computer and the controller are
unsuccessful.
COM port not configured in
system.
Verify that the COM port is
configured in the system.
Cabling between computer and
controller.
Verify that the cable between the
computer and the controller is
correctly wired.
Baud rate and parity configured
incorrectly.
Verify that the baud rate and
parity on the computer are
consistent with those on the
controller.
Wrong address. Verify that the slave address is
correct.