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 transferrin g scree n dat a t hrough M J1,
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