Mitsubishi GOT2000 Series User Manual page 186

If the dialog mentioned right is displayed after selecting connecting
target confirmation or during CPU communication check, confirm the
following.
• No misconnection with CPU
➠
• No missettings of parameter
➠
• Check if the hardware has no problems.
➠
If touch [OK] button in the dialog after confirming the result, returns to
[I/O check].

Self-loopback
If touch [Self], the hardware check of RS-232 interface is carried out.
1.
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 ([None]).
2.
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 shown right appears and the GOT restarts in five
seconds.
When the dialog shown right appears, check the following.
• 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.
➠
• Check if the hardware has no problems.
➠
3.
During check, the dialog shown right is displayed.
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4.9 I/O Check
GOT2000 Series Connection Manual for the
controller used
2.10.3 Controller contents
GOT2000 Series User's Manual (Hardware)
2.10.3 Controller contents
GOT2000 Series User's Manual (Hardware)
Display unit (rear face)
RS-232 interface