Dnf-controls Analyst, RS422/RS232 Tester With (LOG 1) SR Data L Uživatelský manuál stáhnout pdf (Strana 20)

Page 16 of 27 The Analyst RS422/RS232 Tester

MONITOR Mode Troubleshooting Tips

Step# On Analyst Display What it means

1 The top line of the display,

after ÎÎ, is blank.

There is no communication from the Controller.

Press the [DIR] key to select the DIRÎÎ screen.

Press the [RxTx] key to swap the transmit and

receive lines from the Controller. If characters are

now displayed on the top line of the display, the

transmit and receive lines are swapped.

IN Port RS232 Only-

The DTR indicator and RTS indicator on the front of

the Analyst will turn on when the DTR and RTS signal

lines are “ON”.

Press the [RTS] key to connect IN port RTS to CTS,

and IN port DTR to DSR. Some controllers require a

CTS and/or DSR handshake line to enable their

transmitter.

2 The top line of the display,

after ÎÎ, shows

unreadable characters.

The Controller is transmitting data to the Analyst, but

the transmit circuit may be reversed.

Press the [DIR] key to select the DIRÎÎ screen.

Press the [Rx+] key to reverse the receive lines

(RS422 only) at the Analyst. If readable data is now

displayed on the top line of the display, the Controller

transmit lines are reversed.

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Dnf-controls Analyst, RS422/RS232 Tester With (LOG 1) SR Data L Uživatelský manuál Strana 20