Appendix

 

Troubleshooting the RS-232C Faults

 

Check the items in the following in the event of operating problems with the RS-232C interface.

 

The RS-232C does not operate at all.

 

►Is the cable properly connected?

▪ See "RS-232C Cable Connection."

 

►Is the setting of the RS-232C correct?

▪ See "RS-232C Cable Connection."

 

►Are all the devices that are connected powered on?

 

 

An attempt to read data using the CALL RECEIVE statement causes the RS-232C bus to hang.

 

►Each and every CALL RECEIVE statement must be preceded by a query.

►Is the query transmitted incorrect?

 

 

Although a command was transmitted, the unit did not operate.

 

►Use the "*ESR?" query to check the standard event status register for anomalies.

▪ See Chapter1, "1.2 The Status Byte and the Event Registers."

 

 

Even though a number of queries were sent, only one response was received.

 

►Has an error occurred?

▪ The response should be read immediately after each query.

▪ To read several responses in one operation, the corresponding queries must be combined into a single line using the message separator.

 

 

An overrun error or a framing error occurs.

 

►Is the transfer rate too high?

Reduce the transfer rate.

 

 

Troubleshooting the LAN Faults

 

Check the items in the following table in the event of operating problems with the LAN interface.

 

The LAN does not operate at all.

 

►Is the cable properly connected?

 

►Is the IP address of the unit correctly set? Does it clash the address of other equipment on the same network?

 

►Are all the devices that are connected powered on?

 

 

The communication is not proper with 10BASE-T LAN

 

►Set the delimiter properly.

▪ See Receive and Send Protocols

 

 

Although a command was transmitted, the unit did not operate.

 

►Use the "*ESR?" query to check the standard event status register for anomalies.

▪ See Chapter1, "1.2 The Status Byte and the Event Registers."

 

 

Even though a number of queries were sent, only one response was received.

 

►Has an error occurred?

▪ The response should be read immediately after each query.

▪ To read several responses in one operation, the corresponding queries must be combined into a single line using the message separator.