6.5 Precautions

Connection to FXCPU

(1)When connecting to FX3G/FX3GC/FX3U/FX3UC series When the keyword of FXCPU (FX3G/FX3GC/FX3U/ FX3UC series) has been set, GOT may not be able to monitoring.Perform an I/O check again.

( ■ Perform an I/O check) When the result of the I/ O check is normal, check the status of keyword registration.

(2)When connecting with function extension board or communication special adapter

When a sequence program and settings that the FXCPU communicates with devices other than the GOT are set with software, including GX Developer, the FXCPU cannot communicate with the GOT.

(a)Settings with sequence program

Check the sequence program and delete the following.

FX SERIES PROGRAMMABLE

CONTROLLERS USER'S MANUAL - Data

Communication Edition

•No protocol communication (RS instruction)

•Sequence program with the computer link, N:N network, and parallel link

•Parameter setting

•Set the following special registers to 0. Except FX3U, FX3UC: D8120

FX3U, FX3UC: D8120, D8400, D8420

FX3G, FX3GC: D8120, D8400, D8420, D8370

(b)Settings with GX Developer

Select [PLC parameter] in [Parameter], and then click the PLC system(2) tab on the FX parameter screen.

Uncheck [Operate communication setting], and then transfer the parameter to the programmable controller.After the transfer, turn off the programmable controller, and then turn on the programmable controller again.

(3)Connection to GT1020-LL, GT1030-L

When connecting GT1020-LL or GT1030-L to FX3G series, they cannot be connected to standard built-in port (RS-422) and function expansion board (FX3G-422-BD) simultaneously.

Connection in the multiple CPU system

When the GOT is connected to multiple CPU system, the following time is taken until when the PLC runs.

•QCPU (Q mode), motion controller CPU (Q series): 10 seconds or more

•MELDAS C70: 18 seconds or more

When the GOT starts before the PLC runs, a system alarm occurs.Adjust the opening screen time in the GOT setup so that no system alarm occurs.

GT Designer3 Version Screen Design Manual

Connection to LCPU

LCPU may diagnose (check file system, recovering process, etc.) the SD memory card when turning on the power or when resetting. Therefore, it takes time until the SD memory card becomes available. When the GOT starts before the SD card becomes available, a system alarm occurs. Adjust the opening screen time in the GOT setup so that no system alarm occurs.

GT Designer3 Version Screen Design Manual

Connection to basic model QCPU

Do not set the serial communication function of Q00UJ/ Q00U/Q01U/Q02UCPU, Q00/Q01CPU. If the function is set, the communication may not be performed.

Connection to Q170MCPU

Set [CPU No.] to "2" in the device setting to monitor the device of the Motion CPU area (CPU No.2).

When the CPU No. is set to "0" or "1", the device on the PLC CPU area (CPU No.1) is monitored.

When the CPU No. is set to the number other than "0" to "2", a communication error occurs and the monitoring cannot be executed.

For setting the CPU No., refer to the following manual.

GT Designer3 Version Screen Design Manual

Example) Setting dialog box of the bit device

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6. DIRECT CONNECTION TO CPU

 

6.5 Precautions