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6-12 2. Main Menu Screen
RS-485 signal test
Turn the [CN1] and [RS485] switches on.
• SD/RD Test
Check the signals [SD] and [RD].
1. Install a jumper between pins 12 and 24 and between pins 13 and 25 of CN1 on the backside
of the UG230.
2. Press the [Self-Loop Test] switch. When the [OK] lamp lights up, the test is successfully
completed.
* If the [NG] lamp lights up, consult your local distributor.
• CTS/RTS Test
Check the signals [CTS] and [RTS].
1. Install a jumper between pins 14 (+RTS) and 19 (+CTS) of CN1 and between pins 17 (−RTS)
and 18 (−CTS) on the backside of the UG230.
2. Press the [RTS] switch and check that both [RTS] and [CTS] lamps light up at the same time.
Press the [RTS] switch again and check that both [RTS] and [CTS] lamps go off at the same
time.
CN1
MJ1
MJ2
Communication Port
RS232C
RS485
Self-Loop
Test
CTS RTS
NG OK
CTS RTS
NG OK
Self-Loop
Test
CTS RTS
NG OK
CTS RTS
NG OK
CTS RTS
NG OK
CTS RTS
NG OK
Self-Loop
Test
Self-Loop
Test
Self-Loop
Test
Self-Loop
Test