Chapter 4 – Safety
Chapter 3: Troubleshooting
Troubleshooting Examples
Situation A: The modem does not answer through the serial link
If the Wireless MultiModem does not answer through the serial link upon an attempted transmission of data or voice signals, see the table below for possible causes and solutions.
Solutions for ‘no connection through serial link’ situation
If the | Then ask … | Action |
modem |
|
|
returns … |
|
|
(nothing) | Is the modem | Provide a power supply in the range of 5 to |
| powered correctly? | 32Vdc. |
| Is the serial cable | Connect cable per step 5 of the ”Electrical |
| properly connected | Installation and Configuration” procedure. Verify |
| to the modem and | cable pinout per”RS232 |
| PC sockets? | table, esp Rx & Tx connections. Verify reception |
|
| & transmission. |
| Is the | In communications program, verify that modem |
| communication | parameters have been set to the values shown |
| program properly | here: |
| configured? | Data bits = 8 |
|
| Parity = none |
|
| Stop Bits = 1 |
|
| Baud = 115200 bps |
| Is another program | Close any such application program. |
| interfering with the |
|
| communication |
|
| program? |
|
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