Filter
Top Products
7-4 Panel C Industrial Computer Hardware User's Manual – May 2003 GFK-2251
7
Communications
PLC/PC Connection
Symptom Possible Causes Solution
PANEL C 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
PANEL C 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 computer 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.
CNC/PC Communications
Symptom Possible Causes Solution
Communications between the
host computer and the CNC
are unsuccessful.
If an ISA interface HSSB card,
the I/O address may be in
conflict with other devices
Check PC for conflicting I/O
addresses
HSSB switch setting may be
incorrect.
Check that the switch is set to
0, 1 or 2.
The HSSB driver is not
installed
Check Windows event log for
errors that the HSSB driver
(MMCNCD) is not installed
The HSSB option may not be
active in the CNC
Verify that the option and
correct CNC Executive
Software is installed in the
CNC
The cable connecting the CNC
and the PC may not be
attached
Verify that the green LED on
the HSSB board is on.