Denso Power Net Terminal BHT-103 Dokumentacja Pobierz pdf (Strona 135)

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Chapter 8. Files

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8.2 Data Files

8.2.1 Overview

Like user programs, data files will be stored in the user area of the memory. The location of the

user area differs depending upon the BHT series as shown below.

* Drive B is provided for ensuring the compatibility with conventional BHT series.

The memory space available for data files is (Memory space on drive A - Memory space occu-

pied by user programs).

For the memory mapping, refer to Appendix F, "Memory Area." You may check the current

occupation of the memory with the

FRE function.

8.2.2 Naming Files

The name of a data file generally contains filename.extension. The filename can

have one to eight characters; the extension can have one to three characters.

The

filename.extension may be preceded by the drivename. The drivename is

A: or B:. If the drivename is omitted, the default A: applies.

The

extension can be omitted. In such a case, a period should be also omitted. The fol-

lowing extensions cannot be used for data files:

Unavailable extensions for data files .

PD3, .FN3, .EX3, and .FLD

Programs make no distinction between uppercase and lowercase letters for drive names, file

names, and extensions. They regard those letters as uppercase.

BHT series Location of user area

BHT-100 Drive A and drive B*

1 2 ... 130 131 132 133 134 135 136 137 138 139 140 ... 576 577

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