7 |
Communications
PLC/PC Connection
Symptom | Possible Causes | Solution |
|
|
|
PANEL C does not | The system is attempting to | 1. With the PLC powered up |
communicate with a PLC that | communicate with a | and connected to the Display |
has been autoconfigured | using the SNP driver and a | Station, establish |
(AUTOCONFIG/DEFAULT/I/O | PANEL C project. | communication between the |
error). |
| Display Station and PLC via |
|
| the |
|
| 2. Using a |
|
| 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 | COM port not configured in | Verify that the COM port is |
host computer and the | system. | configured in the system. |
controller are unsuccessful. |
|
|
| Cabling between computer and | Verify that the cable between |
| controller. | the computer and the controller |
|
| is correctly wired. |
| Baud rate and parity configured | Verify that the baud rate and |
| incorrectly. | 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 | If an ISA interface HSSB card, | Check PC for conflicting I/O |
host computer and the CNC | the I/O address may be in | addresses |
are unsuccessful. | conflict with other devices |
|
| HSSB switch setting may be | Check that the switch is set to |
| incorrect. | 0, 1 or 2. |
| The HSSB driver is not | Check Windows event log for |
| installed | errors that the HSSB driver |
|
| (MMCNCD) is not installed |
| The HSSB option may not be | Verify that the option and |
| active in the CNC | correct CNC Executive |
|
| Software is installed in the |
|
| CNC |
| The cable connecting the CNC | Verify that the green LED on |
| and the PC may not be | the HSSB board is on. |
| attached |
|
Panel C Industrial Computer Hardware User's Manual – May 2003 |
