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FAQ within [ MELSEC-Q Series ]
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How to read device data and file registers in Q series
Specify the target memory in the Read from PLC window and execute reading. More Details >>
- No:22564
- Release Date:2018/09/03 17:29
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Recommended cables for MODBUS(R) interface module QJ71MB91
The RS-232 cable should meet RS-232 standards and not exceed 15 m in length.The RS-422/485 cable should meet specifications described in the following manual... More Details >>
- No:22566
- Release Date:2018/09/03 17:29
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It includes sample comments for special relay/special register and the intelligent function module. On the menu of GX Works2, select [Edit] -> [Import ... More Details >>
- No:22581
- Release Date:2018/09/03 17:29
- Update:2018/09/20 17:12
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Reading file registers simultaneously with the program, parameters, and other data in GX Works2
No. Switch the target memory for PLC Data and read the file registers alone. More Details >>
- No:22616
- Release Date:2018/09/03 17:29
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Operation error at the execution of a BIN instruction
Keep SM722 ON or correct the program so that any one of the ten numbers 0 to 9 is stored in each digit of the source data.An operation error occurs when data... More Details >>
- No:22635
- Release Date:2018/09/03 17:29
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MODBUS(R) interface module's involvement in master and slave stations
Intelligent function module settings allow them to be set in both master and slave stations. More Details >>
- No:22637
- Release Date:2018/09/03 17:29
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Q series device data held in the case of a power failure
The data in the devices assigned to Latch (1) or Latch (2) in the "Device Setting" window ([PLC Parameter] -> [Device Setting] window) is held when a pow... More Details >>
- No:22638
- Release Date:2018/09/03 17:29
- Update:2018/09/21 11:37
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Recommended cables for the MODBUS(R) interface module QJ71MT91
For 100BASE-TX, shielded twisted pair cables (STP cables) with category 5 can be used.For 10BASE-T, Straight and unshielded twisted pair cables (UTP cables) ... More Details >>
- No:22659
- Release Date:2018/09/03 17:29
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USB cable type for CPU modules
It is the miniB-type. More Details >>
- No:22677
- Release Date:2018/09/03 17:29
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Setting of "Target MODBUS(R) device head number"
Set "(Last five digits of actual device number) - 1" for the Target MODBUS(R) device head number.Example) For the holding register 400018, set "17". More Details >>
- No:22682
- Release Date:2018/09/03 17:29
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