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2
1. Operation of V7 Main Menu 2-5
MONITOUCH Operations
2-1. Self-loop Test
This is a signal test for communications through the CN1, MJ1 or MJ2 connector. Perform
this test if the communication is not successful when transferring screen data through MJ1,
connecting the PLC using CN1, or selecting multi-link 2, temperature controller/PLC2Way
or PLC for MJ1/2, or connecting the card recorder or serial extension I/O.
CN1: RS-232C Signal Test
Turn the [CN1] and [RS232C] switches on.
• SD/RD Test
Check the signals [SD] and [RD].
1. Install a jumper between pins 2 and 3 of CN1 on the backside of the V7 unit.
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 4 (RTS) and 5 (CTS) of CN1 on the backside of the V7
unit.
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
RS232C
MJ1 RS485
MJ2
Communication Port
Self-Loop Test
CTS RTS
NG OK
Self-Loop Test
CTS RTS
NG OK
Self-Loop Test
CTS RTS
NG OK
Self-Loop Test
CTS RTS
NG OK
Self-Loop Test
CTS RTS
NG OK
Self-Loop Test
CTS RTS
NG OK