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