Mitsubishi Electronics GOT1000 20.5 Precautions

20.5 Precautions

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 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

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.)

1st GOT	PC
	2nd GOT

RS-232

ROBOT CONTROLLER CONNECTION

CNC CONNECTION

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

USB

1st GOT

GOT MULTI-DROP CONNECTION

(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.

Power supply (24V DC)			The title screen
Power feeding to GOT			is displayed.

Communication of the

First GOT's2nd GOT is enabled. user screen communication

Second GOT's
communication	Retry	user screen
	Retry	user screen

Monitoring stop condition for the GOT in the multiple-GT11 connection

In the system where multiple GOTs are connected, performing either of the following monitoring stop operations on the preceding stage (the first GOT) also stops monitoring of the GOT on the next stage (the second GOT).

When the GOT on the preceding stage resumes monitoring, the GOT on the next stage also resumes it.

•When project data or the OS is written/read by GT Designer3*1

•When the GOT is set up*1

*1 A timeout error occurs in GX Developer.

	1st GOT	2nd GOT GT Designer3
	Downloading	Monitoring
	Downloading	stopped
		stopped

USB

The project data is being download.

When PLC power disconnection occurs in the multiple-GOT connection

In the system where multiple GOTs are connected, when the communication between the PLC and the first GOT is stopped due to PLC power disconnection and a disconnection of the communication cable between the PLC and the first GOT, the GOT waits for timeout against the communication request from the peripheral devices (GX Developer, etc.), and recovery of monitoring between the PLC and the GOT is delayed.

1st GOT	2nd GOT
Monitoring	Monitoring

MULTIPLE-GT14, GT12, GT11, GT10 CONNECTION FUNCTION

FUNCTION

MULTI-CHANNEL

FUNCTION

FA TRANSPARENT

20. MULTIPLE-GT14, GT12, GT11, GT10 CONNECTION FUNCTION	20 - 11
20.5 Precautions