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

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Powerware FCC 15 manual Troubleshooting, Problem Possible Cause Corrective Action

FCC 15 specifications

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