Mitsubishi FX3U Series User Manual

436
FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
21 FX3U-FLROM-16/64/64L (Memory Cassette)
21.6 Transfers By Display Module Operation
21.5.3 Reading (RD: 64L <− PLC)
Programs are read from the PLC’s internal RAM memory to the memory cassette.
Required condition: The PLC must be stopped, and the PROTECT switch must be OFF.
1 Turn the PROTECT switch OFF at the rear face of the memory cassette.
The memory cassette must be removed from the PLC in order to turn the PROTECT switch OFF.
→ Refer to Subsection 21.2.2 for the removal procedure.
2 Install the memory cassette on the main unit.
→ Refer to Subsection 21.2.1 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.
3 Press the [RD] key 1 time.
The [RD] LED lights, and a preparation status is established.
• To cancel, press the [WR] key.
4 Press the [RD] key again.
Reading is executed, and the [RD] LED blinks.
5 Remove the memory cassette from the main unit.
Reading is completed when the [RD] LED goes off.
After turning the PLC power OFF, remove the memory cas-
sette from the PLC, then turn the PROTECT switch ON.
→ Refer to Subsection 21.2.2 for the removal procedure.
21.6 Transfers By Display Module Operation
Programs can be transferred (reading/writing) between the memory cassette and the PLC’s internal RAM
memory by a display module operation.
→ Refer to Section 19.17 for the memory cassette transfer function.
21.7 Operation Precautions
Observe the following precautions when writing to file registers (D) and extended file registers (ER) by
program.
1. Flash memory writing count
10,000 writing operations are permitted at the flash memory.
2. Precaution for file register usage
Writing to the flash memory occurs at each PLC operation cycle if BMOV instructions are used in a
continuous execution format with regard to a file register.
To prevent this, be sure to use "pulse execution format" (BMOVP) instructions.
3. Precaution for extended file register (ER) usage
Do not use continuous constant-execution SAVER and LOGR instructions with regard to extended file
registers. Use the individual instructions only when required.
RUN
STOP
FX
3U
-48MR/ES
ERROR
RUN
BATT
POWER
0
312
IN
645
21
7
20
24
22
23
26
25
10
11 1312
1614
15
17
27
OUT
0
3
1
2
6
4
5
21
7
20
24
22
23 26
25
10
11
13
12
16
14
15
17
27
[RD] LED [RD] key
WR(64LJPLC)
RD(64LIPLC)

Mitsubishi FX3U Series Specifications

General

Brand	Mitsubishi
Model	FX3U Series
Category	Controller
Language	English