
Serial Link Installation and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
10-7
TABLE 10-2. PROBLEMS WITH THE SERIAL LINK
SYMPTOM PROBLEM/SOLUTION
Xmit light on 485 card
does not blink 6 times
while ADDapt attempts to
connect.
Computer/485 card configuration is not compatible. To fix, see 485 card
instructions and computer setup instructions. The 485 card must have its
CTS DISABLED. An internal 485 card must have its defined COM port
(usually a jumper on the card) DISABLED in the computer's setup. For an
external 485 card, the computer must have its serial port ENABLED. The
proper COM port must be defined in CONFIG also.
Xmit light on 485 card is
on all the time.
Check receive wires to J8, pins 1, 2.
Xmit light on 485 card
flashes 6 times but does
not connect.
Baud rates are incompatible: Change LINK BAUD in drive and reset. If
that does not solve the problem, when entering ADDapt, type ADDAPT -
bxxxx, where xxxx is either 4800 or 9600. This will override the default
computer baud rate.
If that does not solve the problem, change default baud
rate in CONFIG.SYS by adding BAUD=xxxx and reboot.
Serial link addresses are incompatible. Change in CONFIG; if that does not
solve the problem, change jumpers on system board.
Software part no. and version no. of flash prom do not match CONFIG.
If the above is OK and the receive LED on 485 card flashes, replace the 485
card or replace the Microprocessor board.
ADDapt will not link
reliably and/or loses the
link spontaneously.
If all configuration is good, then either EMI noise or hardware is the
problem. Check for loose wiring or change out the microprocessor board,
485 card or CPU. Cable should be two twisted, shielded pairs. Shields
should be grounded at transmit end only. Do not run wiring in high voltage
raceway or parallel to any high voltage or AC wiring.
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