Denso Power Net Terminal BHT-7500 Especificaciones Pagina 150

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Chapter 8. Files
141
8.2.6 About Drives
The BHT-5000/BHT-6000/BHT-6500/BHT-7000/BHT-7500 has logical drives.
BHT-5000/BHT-6000/BHT-6500
Drive A and drive B are defined on the RAM and flash ROM, respectively. Accordingly, the file
access is partially different between drive A and drive B as listed below.
* The BHT deletes data actually when next downloading takes place. To delete data, the BHT-
5000/BHT-6000 (System version 2.00 or later)/BHT-6500 uses an empty area of drive A by
64 kilobytes. The BHT-6000 (System version earlier than 2.00) uses it by 128 kilobytes. If
there is no such space in drive A, a run-time error (44h) will occur.
BHT-7000/BHT-7500
Drive B is provided for ensuring compatibility with the BHT-5000/BHT-6000/BHT-6500.
If you specify drive name "B:" preceding a filename.extension and open an existing file, the
BHT will open the file as a read-only file. Executing the
PUT statement to the read-only file, a
run-time error (43h) will result.
If you specify drive name "A:" or omit a drive name, the BHT will open the file as a read/write
file.
The
XFILE and KILL statements will ignore drive names "A:" and "B:."
The table below lists the file access details relating to drives.
File access operation To drive A To drive B
Download
Create
Open
Read
Write
Close
Clear
Delete
XFILE statement
New with
OPEN statement
Open with
OPEN statement
GET statement
PUT statement
CLOSE statement
CLFILE statement
KILL statement
Same as left.
Run-time error (43h)
Same as left.
Same as left.
Run-time error (43h)
Same as left.
Run-time error (43h)
Same as left.*
File access operation To drive A To drive B
Download
Create
Open
Read
Write
Close
Clear
Delete
XFILE statement
New with
OPEN statement
Open with
OPEN statement
GET statement
PUT statement
CLOSE statement
CLFILE statement
KILL statement
Same as left.
Run-time error (43h)
Same as left.
Same as left.
Run-time error (43h)
Same as left.
Run-time error (43h)
Same as left.
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