Omron NJ501-1500 User Manual

2-817
2 Instruction Descriptions
NJ-series Instructions Reference Manual (W502)
SD Memory Card Instructions
2
FileRead
Execution condition
Value of Trigger from previous task period
Processing started.
Processing
Read data
Stage change
File ID
Variable Data type Initial value Comment
ST
IF ( (Trigger=TRUE) AND (LastTrigger=FALSE) AND (_Card1Ready=TRUE) ) THEN
OperatingStart:=TRUE;
Operating :=TRUE;
END_IF;
LastTrigger:=Trigger;
IF (OperatingStart=TRUE) THEN
FileOpen_instance(Execute:=FALSE);
FileSeek_instance(Execute:=FALSE);
FIleRead_instance(
Execute:=FALSE,
ReadBuf:=InDat[0]);
FileClose_instance(Execute:=FALSE);
Stage :=INT#1;
OperatingStart:=FALSE;
END_IF;
IF (Operating=TRUE) THEN
CASE Stage OF
1 :
FileOpen_instance(
Execute :=TRUE,
FileName:=’ABC.bin’,
Mode :=_READ_EXIST,
FileID =>Fid);
IF (FIleOpen_instance.Done=TRUE) THEN
Stage:=INT#2;
END_IF;
IF (FileOpen_instance.Error=TRUE) THEN
Stage:=INT#99;
END_IF;
2 :
FileSeek_instance(
Execute:=TRUE,
FileID :=Fid,
Offset :=DINT#2,
Origin :=_SEEK_SET);
IF (FileSeek_instance.Done=TRUE) THEN
Stage:=INT#3;
END_IF;
IF (FileSeek_instance.Error=TRUE) THEN
Stage:=INT#99;
END_IF;
// Start sequence when Trigger changes to TRUE.
// Execute instructions.
// File name
// Read file.
// File ID
/// File ID
// File position indicator goes to second byte from the beginning.
//
// Normal end
// Error end
// Normal end
// Error end
// Initialize instance.
// Dummy
// Initialize instance.
// Initialize instance.
// Initialize instance.
// Initialize instance.
// Open file.
// Seek file.
Trigger
LastTrigger
OperatingStart
Operating
InDat
Stage
Fid
FileOpen_instance
FileSeek_instance
FileRead_instance
FileClose_instance
False
False
False
False
[1000(16#0)]
0
16#0
BOOL
BOOL
BOOL
BOOL
ARRAY[0..999] OF BYTE
INT
DWORD
FileOpen
FileSeek
FileRead
FileClose
_Card1Ready BOOL
SD Memory Card Ready Flag
Variable Data type Comment
Internal Variables
External Variables

Omron NJ501-1500 Specifications

General

Brand	Omron
Model	NJ501-1500
Category	Controller
Language	English