Mitsubishi Electric GOT2000 Series, Руководство по подключению

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20 - 18
20.5 Precautions
20.5 Precautions
■1.
GOT's communication timing
(1) GOT's communication timing
Adjust the communication timing so that, after applying the power to the system, the communication with the
connected device (MITSUBISHI ELECTRIC PLC) is performed in order starting from the first GOT (from the 1st GOT
to the 2nd, and so on).
When the communication is failed, retries are performed. And if the predetermined time has elapsed, a
communication error occurs.
• If the first GOT is turned on after a while the second GOT is turned on, because the communication start of the
second GOT is delayed, a communication error may be detected at the second GOT.
• If the system power is turned on simultaneously and it takes time to start the communication of the second GOT, a
communication error may be developed.
(2) Adjusting communication timing
(a) When powering up the system simultaneously
Using the utility or selecting [GOT Setup] - [Opening Screen Time] from GT Designer3, set the opening screen
time adding a delay to each setting for the GOTs.
During the opening process, communication with the connected device does not start.
Example: Set value of [Opening Screen Time] (Inside (): set value)
First module (5s)
Second module (10s)
(b) When powering on devices individually
Turn on the connected device first, and then the first GOT, the second GOT, and so on.
■2.
Using the FA transparent function
When multiple GOTs are connected, the FA transparent function is not available even if the RS-232 interface or USB
interface is used for the connection.
(When connecting a personal computer to the first GOT, the FA transparent function can be used.)
User screen
User screen
The title screen
is displayed.
Power supply
(24VDC)
supplied to GOT
First GOT's
communication
Second GOT's
communication
Retry
Communication of the
2nd GOT is enabled.
PC
PC
1st GOT 2nd GOT
RS-232
PC
1st GOT
USB