Denso Power Net Terminal BHT-7500 Spezifikationen Seite 526

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Appendices
The size and area allocation of the memory incorporated in the BHT differ depending upon the
models as listed below.
*1
The cluster size is 8 KB.
*2
468 KB in System version 2.00 or newer
*3
Plus a maximum of 404 KB if you delete fonts
*4
Plus a maximum of 256 KB if you delete fonts
Memory Management
The BHT manages the user area of the memory for user programs and data files by a unit
of segment called "cluster." The cluster size is usually 4 kilobytes. In some models or
drives, the cluster size is 8 kilobytes as listed above.
The maximum allowable size for a single user program is 64 kilobytes excluding register
variables.
Battery Backup of Memory
The BHT-3000 backs up user programs and data files stored in the memory with alkaline
manganese batteries. The BHT-4000 backs up them with a rechargeable battery cartridge.
The BHT-5000/BHT-7000/BHT-7500 backs up them with a rechargeable battery cartridge
or dry battery cartridge. The BHT-6000/BHT-6500 backs up them with dry batteries or
rechargeable battery cartridge. Therefore, those data will not be lost if the BHT power is
turned off.
BHT series Models User area User area in drive B (B:)
BHT-3000 BHT-3041
BHT-3045
104
488
BHT-4000 BHT-4082
BHT-4086
BHT-4089
100
612
1872
*1
BHT-5000 BHT-5071
BHT-5075
BHT-5077
BHT-5079
92
464
964
1976
*1
124
*4
124
*4
124
*4
124
*4
BHT-6000 BHT-6045
BHT-6047
BHT-6049
464
*2
464
*2
464
*2
64
*4
568
*4
1584
*1*4
BHT-6500 BHT-6505
BHT-6509
464
1976
*1
60
*4
60
*4
BHT-7000 BHT-7064 2156
*3
BHT-7500 BHT-7508 6060
*3
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