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PHOENIX CONTACT 3827_en_B
• Connect the terminal points 5.1 and 5.2 of the RS-232 interface on the slave module
you need to test.
Figure 10-1 Loopback test for an RS-232 interface
• Connect both wireless modules to the power supply.
• Check the wireless connection via the LED bar graph.
• Enter several characters of your choice. HyperTerminal transmits these characters
over the wireless path. On the slave side the characters are output (e.g., at terminal
point 5.1, RX cable of the RS-232 interface) and immediately read again using the
bridge (e.g., at terminal point 5.2, TX cable of the RS-232 interface). This returns the
already transmitted characters and they appear twice on the HyperTerminal screen.
– The screen remains blank if the check was not successful. Monitor the TX and RX
LEDs on every wireless module. You can thereby determine the point up to which
data has been transmitted.
– In case the characters only appear once, check the HyperTerminal settings for
hidden outgoing characters. The following options must be enabled under
“File, Properties, Settings, ASCII Setup”:
“Echo typed characters locally” and
“Append line feeds to incoming line ends”
Figure 10-2 Settings in HyperTerminal
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V
R
S
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I+
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Reset
RAD-ID
RAD-2400-IFS
S.PORT
8
8
PW
R
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AT
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TX
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4
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5.1
5.2
5.3
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