Mitsubishi Electric GOT2000 Series User Manual page 220

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].
■2. Self-loopback
If touch [Self], the hardware check of RS-232 interface is carried out.
Step 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]).
Step 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.
➠
Step 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