5-30 2. Main Menu Screen
9-1. Self-loop Test
This is a signal test for communications through the COM1, COM2 or COM3 connector.
Perform this test if the communication is not successfully established when connecting a controller
(PLC, temperature controller, etc.) using COM1, COM2 or COM3.
COM1: RS-485 Signal Test
SD/RD Test
Check the signals [SD] and [RD].
1. Set DIP switch Nos. 2 and 3 to OFF.
* Turn the power off when setting DIP switches.
2. Install a jumper between pins 1 and 4, and between pins 2 and 3 of COM1 on the TS series.
3. Press the [COM1] switch in the [Communication Port] field. The [RS485] lamp comes on.
4. Press the [Self-Loop Test] switch. When the [OK] lamp lights up, the test is successfully
completed.
* If the [NG] lamp lights up, a pin may be faulty. Contact your local distributor.
COM1 (D-sub 9-pin, female) COM2 / COM3 (D-sub 9-pin, male)
9
5
6
1
6
1
9
5
-RD
+RD 1
2
Name No.
+SD
-SD 3
4