FAQ


FAQAbout Products

- FAQ > Controllers > Programmable Controllers MELSEC > MELSEC-Q Series
FAQ
Keyword Search
FAQ within [ MELSEC-Q Series ]
-
Cause of file register reset by latch clear operation in universal model QCPU
If Latch (1) is set in the device setting of PLC parameter, the contents of file registers are cleared by latch clear operation. Set Latch (2) to maintain t... More Details >>
- No:22584
- Release Date:2018/09/03 17:29
- Update:2018/09/20 17:31
-
Connect with a straight cable using a hub. For more details, refer to the following manual. - FL-net (OPCN-2) Interface Module User's Manual More Details >>
- No:22574
- Release Date:2018/09/03 17:29
- Update:2018/09/20 16:55
-
How to turn OFF the "COM.ERR" LED of the Ethernet module
The LED can be turned OFF by operations from GX Developer. The operation method is as follows.(1) Connect to the CPU in the standby system in Transfer Setup.... More Details >>
- No:22571
- Release Date:2018/09/03 17:29
-
Speeds of access to file registers
If file registers are registered in the standard RAM and "R" is specified by an instruction, the processing time is the same as is the case with the internal... More Details >>
- No:22688
- Release Date:2018/09/03 17:29
-
Memory allocation for online change in GX Works2
The capacity of parameters and programs subtracted from the program capacity for the CPU type in use equals the size of the maximum number of steps. More Details >>
- No:22671
- Release Date:2018/09/03 17:29
-
The automatic communication function and dedicated instructions (MBRW instruction and MBREQ instruction) can be used on the same channel. However, when the... More Details >>
- No:22577
- Release Date:2018/09/03 17:29
- Update:2018/09/20 17:06
-
Battery replacement for High-Performance model QCPU
The contents of the program memory, the standard RAM, and latch devices are not erased if the battery replacement is completed within three minutes, which is... More Details >>
- No:22568
- Release Date:2018/09/03 17:29
-
Follow the procedure below to insert a high-speed timer.- Click the Coil button on the toolbar or press the function key F7, then enter "HT[ ] K[ ]".- Click ... More Details >>
- No:22528
- Release Date:2018/09/03 17:28
-
PLC type change in GX Developer
Follow the steps below and then execute PLC type change.- On the menu of GX Developer, select [Online] -> [Monitor] -> [Stop Monitoring (All Windows)],... More Details >>
- No:22522
- Release Date:2018/09/03 17:28
-
MX Component's compatibility with Windows7 Embedded
MX Component does not support Windows7 Embedded. More Details >>
- No:22698
- Release Date:2018/09/03 17:29
131-140 of Total 213