Siemens simatic hmi op27 Equipment Manual page 97

Storing and Loading Data
Internal flash The internal flash memory is a standard storage medium in the OP. The storage
memory capacity is 1 MB in the case of the OP27M and 2 MB in the case of the OP27C
and OP37. All data types can be stored in the flash memory. Memory alloca-
tion depends on the size of the configuration, the firmware and the data area
configured for data records.
Memory card
The memory card is an external memory medium, comparable to a disk.
Compared to the internal flash memory, the memory card features the follow-
ing advantages:
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Disk, hard disk The OP37 can be supplied with optional 3.5" floppy disk and hard disk drives.
When loading new or modified recipe data on the system is frequently neces-
sary, but the configuration remains unchanged, the 3.5" floppy disk drive is a
very manageable and beneficial solution, since it can be accessed from the
front of the OP37.
Storage principle Data can only be saved in the following combinations for practical purposes:
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1)
This function is not contained on the standard screen and has to be configured.
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The memory card is a portable storage medium. This means, for example,
that recipe data can be transported from one OP to another. In this way,
changes to configurations or firmware updates can be transferred to sys-
tems on which no configuration computer is immediately available for
transferring such data.
Configurations can be loaded directly from the memory card to the working
memory since the OP detects an inserted card. In this case, the OP accesses
the memory card first, before accessing the internal flash memory.
Its storage capacity of up to 16 MB provides space for large configurations
or a large number of recipe data records.
Caution
Memory cards containing stored configurations may only be used with OPs of
the same type. Otherwise, a system crash is possible.
Note
A floppy disk can only be used to store recipe data records in OP mode
(Section 11.1).
The hard disk can only be used in DOS mode (Chapter 15).
firmware, configuration and recipe data records or
firmware and configuration
recipe data.
1)
or
OP27, OP37 Equipment Manual
Release 05/99