TM 5-3895-374-24-1 Identifying 5/03 Processor Communication Errors The Following Probable Cause Recommended Action Error Exists 1. Check line power Inadequate System Power 2. Check 120/240V power supply jumper selection See page 5-5 Also, see the recommended actions Inadequate System Power on page 9-12 Fatal Error and No Communication Check communication channel configuration with APS Communication channel is ”shut Also, see “Returning the 5/03 Processor to Its 'Initial down” Factory Conditions" on page 9-25 Communication channel Is Replace processor damaged The Following Probable Cause Recommended Action Error Exists 1. Check communication parameters of programmer Programmer and processor baud rate must match Programmer and processor node addresses must b different DH-485 2. Try different combinations of communication a baud rate (Processor default Is 19200 parameters are b node address (Processor default Is 1) Improperly set up 3. Try to increase the maximum node address (Default Is 31 ) The 5/03 processor Is See the Advanced Programming Software User Manual trying to (Catalog Number 1747-NM002) for channel configuration establish Information communication, but cannot find 1. Check cable continuity other active Bad Connection 2. Check cable connections between programmer and Communication processor. Device. 3  Check communication device (for example, the 1747-PlC) Replace if necessary 1. Verify proper power supply selection and backplane Low or No Power loading  (The 1747-PIC and 1747-AIC draw power to Communication off the backplane ) Device 2. Verify proper 1201240V power supply jumper selection See page 5-5 Refer to the following key to determine the status of the LED Indicators: Indicates the LED Is OFF Indicates the LED Is ON Indicates the LED is FLASHING Status of LED does not matter Chapter 9 Troubleshooting (page 3-450)