Panasonic FP7 Series Command Reference Manual

19.9 Common Precautions for SD Memory Card Access Instructions
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Instruction operation
● At the start of instruction execution, checks are conducted, whether an SD memory card is
inserted or not, if the cover is closed, and whether the card is write-protected or not.
● During execution, the SD memory card access instruction active flag (SR3A) is ON, and the
execution completion flag (SR3B) is OFF.
● During the execution, the SD memory card access instruction active flag (SR3A) is OFF, and
the execution done flag (SR3B) is ON.
● The execution is performed through multiple scans.
● On completion of execution, the SD memory card access instruction execution result flag
(SR3C) turns ON or OFF according to the result, and the execution end code is stored in
system data register SD30.
● Use the execution result flag to judge whether the SD memory card access instruction is
completed normally or abnormally when the execution done flag turns ON. The contents of
errors are stored in system data register SD30.
● Only one SD memory card access instruction can be executed at a time. To execute more
than one instruction, perform exclusive control using flags such as the SD memory card
access instruction active flag.
● If another SD memory card access instruction is being executed when starting an instruction,
the new instruction cannot be executed.
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Flag operation
Abnormal completion = 1
Normal completion = 0
SD memory card access instruction execution conditions
SR3A：：
SD memory card access instruction active flag
SR3B：：
SD memory card access instruction done flag
SR3C：：
SD memory card access instruction result flag
SD30：：
SD memory card access instruction result code
All the above flags and register are set when the instruction is executed.
The completion is announced at the end of scan.
Zero is set. The end code is set.
The execution is performed through multiple scans.
(Note 1) However, when errors such as no SD memory card, SD memory card write protected, or improper SD
memory card file name length are detected, the completion is announced at the start of instruction
execution without turning ON the active flag.
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Error Codes Table
Error code Description Cause
Types of detected instructions
and the timing
0 Normal end
1 No SD memory card
No SD memory card is inserted, or
the cover is open.
All SD memory card access
instructions, at the start of
instruction execution
2
SD memory card
write-protected
The SD memory card is write-
protected.
Write, delete, move, copy, and
rename instructions
19.9 Common Precautions for SD Memory Card Access Instructions
WUME-FP7CPUPGR-12 19-21

Panasonic FP7 Series Specifications

General

Brand	Panasonic
Model	FP7 Series
Category	Controller
Language	English