If the dialog box mentioned right is displayed after
selecting connecting target confirmation or during CPU
communication check, confirm the following.
• No misconnection with CPU
GOT1000 Series Connection Manual
(3.3.6 Verifying GOT recognizes controllers))
• No missettings of parameter
10.2 Communication Detail Setting)
• No hardware error.
button in the dialog box After confirming the result, returns to [I/O check].
If touch [Self], the hardware check of RS-232 interface is carried out.
For preparation for the self-loopback
communication check, insert the connector for self-
loopback check (Customer purchased) shown in the
diagram right in the RS-232 interface.
For this connector, short 2 and 3 pins, 7 and 8 pins
and 4 and 6 pins, respectively.
In the communication setting of the GOT utility, set
the channel number for the RS-232 interface to 0
After selecting [Self], the transferred data and
received data are verified through the self-loopback
connector. When the GOT cannot receive the data
during the data transmission, the dialog box shown
right appears and the GOT restarts in five seconds.
When the dialog box shown right appears, check the
• Check if the pins of the connector for self-
loopback check are incorrectly shorted.
• Check if the channel number for the RS-232
interface is set to 0 ([None]) in the communication
setting of the GOT utility.
10.1.3 Communication setting contents)
• Check if the hardware has no problems.
Display unit (rear face)
12.1 Diagnostic Functions
12.1.7 I/O check