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FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
11 Memory Cassette/Battery
11.2 Memory Cassette <-> PLC (RAM Memory) Transfers by Loader Function
11.2 Memory Cassette <-> PLC (RAM Memory) Transfers by Loader Function
The FX3U-FLROM-64L loader function ([WR] and [RD] key operation) is explained in this section.
• Supported in Ver. 2.20 or later
• Program transfers (reading/writing) are possible between the memory cassette and the PLC’s internal
RAM memory.
• The loader function is enabled while the PLC is stopped.
11.2.1 Tool for pressing the [WR] and [RD] keys
Use an insulator tool (plastic, ceramic, etc.) to press the [WR] and [RD] keys. The area around the keys is not
insulated. Using a metal screwdriver, etc. can cause equipment damage.
11.2.2 Writing (WR: 64L -> PLC)
A memory cassette program is written to the PLC’s internal RAM memory.
Required condition: The PLC must be stopped.
1 Install the memory cassette on the main unit.
(Setting the PROTECT switch to ON (on memory cassette’s rear face) prevents accidental overwriting of
memory cassette program.)
→ Refer to Section 3.7 for the installation procedure.
• Verify that the PLC power is OFF, then install the memory cassette on the PLC.
• Turn the PLC power ON.
• Raise the memory cassette’s eject lever.
2 Press the [WR] key 1 time.
The [WR] LED lights, and a preparation status is established.
• To cancel, press the [RD] key.
3 Press the [WR] key again.
Writing is executed, and the [WR] LED goes off.
• Writing to the built-in RAM is completed instantaneously, and the
LED goes out soon.
4 Remove the memory cassette from the main
unit.
Writing is completed when the [WR] LED goes off.
After turning the PLC power OFF, remove the memory cas-
sette from the PLC.
→ Refer to Section 3.7 for the removal procedure.
[WR] LED [WR] key
FX
3UC-32MT/D
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