Hitachi CMU LPQ520, User Manual

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1 SPECIFICATIONS
1-4
1.3 Differences between the Models LQP520, LQP525 and LQP527
In addition to the differences mentioned under “1.2 Specifications,” there are additional
differences between the models LQP520, LQP525 and LQP527. This section describes these
additional differences.
1.3.1 Time duration of writing to the program storage memory
With the model LQP525 or LQP527, the time duration of writing to the program storage memory
varies with changes in the load factor. The table below shows the relationships between the load
factor of CMU modules and their models. The time values below are those which were found
by sending a 16-MB wsvl file to the CMU modules by means of the FD function ([Utility] - [FD])
of the S10V ladder chart system, where the baud rate of the communication line used was 100
Mbps and the CMU modules were connected with the personal computer by cross-cable.
CMU load factor LQP520 LQP525 or LQP527
0 to 60%
Approx. 6 minutes
Approx. 3 minutes
80% Approx. 5 minutes
100% Approx. 11 minutes
The user should note that the above time values vary depending on the content (and storage
location) of the wsvl file, and should use them only for reference.
1.3.2 The time when writing to the program storage memory ends
Where the model LQP520 is used, any write to the program storage memory ends when the user
has finished all necessary interaction with the software tool they are using. With the model
LQP525 or LQP527, however, such a write may not end even when the user has finished all such
interaction. In this case, the user can learn the progress of the write process from a blinking state
of the USER LED. As a general rule, if the write process is in progress, the user must not turn
off the power to the CMU module, reset the LPU module by operating the reset switch, or
remote-reset it from the software tool while the USER LED is blinking.
As another rule, users of two or more PCs must not write data simultaneously to the same
program storage memory in a single model-LQP525 or LQP527 CMU module, or the user of one
single PC must not operate two or more software tools to write data simultaneously to the same
model-LQP525 or LQP527 CMU module.
The table below is a list of the software tools available for writing to the program storage memory
(flash memory) in a model-LQP525 or LQP527 CMU module and of the option selections
required for that purpose.