Powerware FCC 15 Troubleshooting, For two-wire networks. Verify that the, Problem, Possible Cause

Chapter 6 Troubleshooting

Problem	Possible Cause	Corrective Action
The Modbus Profiler	The wrong communication port number was	Verify the correct port number on your
tool does not	entered in the profiler comX command.	computer that is connected to the Modbus
generate the		Card.
profiler.csv file
	The serial cable is not connected.	Verify that the serial cable connections are
		secure.
Communication	Incorrect communication parameters.	Verify that the communication parameters are
doesn’t work		set to the desired baud rate, No parity, 8 data
		bits, 1 stop bit, and no hardware handshaking.
	RS-485 communication lines are reversed.	For two-wire networks. Verify that the
		master RS-485 network signal TxD(+) is
		connected to the Modbus Card RxD(+) input
		signal and the RS-485 network signal TxD(–)
		is connected to the Modbus Card RxD(–) input
		signal.
		For four-wire networks. Verify that all four
		RS-485 network signals are connected to the
		terminal strip or DB-9 connector as illustrated
		in Table 1 on page 9 or Table 2 on page 10,
		respectively.
		See Chapter 3, “Wiring the Modbus Card” on
		page 7 for more information.
	If the Modbus Card is the last device installed	Verify the termination settings (see
	in the network chain or the length of the	“Termination” on page 10 for the correct
	network cable is excessive, termination	settings).
	needs to be enabled.
	J9 and J10 jumpers could be in the incorrect	Verify the jumpers are in the correct position
	position for your configuration.	(see Figure 4 on page 5).
	The polling rate in the Building Management	The Modbus Card updates the status of the
	Software (BMS) application or Modbus	Eaton equipment every 1000 mS. Configure
	software is set below 500 mS.	the BMS/Modbus application polling rate to
		500 mS or greater to ensure proper operation.

EATON Powerware® Modbus® Card User’s Guide S 164201376 Rev C www.powerware.com 23