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Digitax HD M753 Control User Guide

Issue Number: 3

If the card is removed when Pr

00.030

is set to 3 Pr

00.030

is then

automatically set to None (0).
When a new SD Card is installed Pr

00.030

must be set back to Auto (3)

by the user and the drive reset so the complete parameter set is
rewritten to the new SD Card if auto mode is still required.
When Pr

00.030

is set to Auto (3) and the parameters in the drive are

saved, the SD Card is also updated, and therefore the SD Card
becomes a copy of the drives stored configuration.
At power up, if Pr

00.030

is set to Auto (3), the drive will save the

complete parameter set to the SD Card. The drive will display
'Card Write' during this operation. This is done to ensure that if a user
puts a new SD Card in during power down the new SD Card will have
the correct data.

When Pr

00.030

is set to Auto (3) the setting of Pr

00.030

itself is saved

to the drive EEPROM but not the SD Card.

10.3.4

Booting up from the SD Card on every

power up (Pr 00.030 = Boot (4))

When Pr

00.030

is set to Boot (4) the drive operates the same as Auto

mode except when the drive is powered-up. The parameters on the
SD Card will be automatically transferred to the drive at power up if the
following are true:
•

A card is inserted in the drive

•

Parameter data block 1 exists on the card

•

The data in block 1 is type 1 to 4 (as defined in Pr

11.038

)

•

00.030

on the card set to Boot (4)

The drive will display 'Booting Parameters during this operation. If the
drive mode is different from that on the card, the drive gives a
'Card Drive Mode' trip and the data is not transferred.
If 'Boot' mode is stored on the copying SD Card this makes the copying
SD Card the master device. This provides a very fast and efficient way of
re-programming a number of drives.

'Boot' mode is saved to the card, but when the card is read, the value of
Pr

00.030

is not transferred to the drive.

10.3.5

Booting up from the SD Card on every

power up (Pr mm.000 = 2001)

It is possible to create a bootable parameter data block by setting
Pr

mm.000

to 2001 and initiating a drive reset. This data block is created

in one operation and is not updated when further parameter changes are
made.
Setting Pr

mm.000

to 2001 will overwrite the data block 1 on the card if it

already exists.

10.3.6

8yyy - Comparing the drive full parameter set

with the SD Card values

Setting 8yyy in Pr

mm.000

, will compare the SD Card file with the data in

the drive. If the compare is successful Pr

mm.000

is simply set to 0. If

the compare fails a 'Card Compare' trip is initiated.

10.3.7

7yyy - Erasing data from the SD Card values

Data can be erased from the SD Card one block at a time.
•

Setting 7yyy in Pr

mm.000

will erase SD Card data block yyy.

10.3.8

9666 / 9555 - Setting and clearing the

SD Card warning suppression flag

If the option modules installed to the source and destination drive are
different or are in different slots the drive will produce a 'Card Option' trip.
If the data is being transferred to a drive of a different voltage or current
rating a 'Card Rating' trip will occur. It is possible to suppress these trips
by setting the warning suppression flag. If this flag is set the drive will not
trip if the option module(s) or drive ratings are different between the
source and destination drives. The options module or rating dependent
parameters will not be transferred.
•

Setting 9666 in Pr

mm.000

will set the warning suppression flag

•

Setting 9555 in Pr

mm.000

will clear the warning suppression flag

10.3.9

9888 / 9777 - Setting and clearing the

SD Card read only flag

The SD Card may be protected from writing or erasing by setting the
read only flag. If an attempt is made to write or erase a data block when
the read only flag is set, a 'Card Read Only' trip is initiated. When the
read only flag is set only codes 6yyy or 9777 are eff.
•

Setting 9888 in Pr

mm.000

will set the read only flag

•

Setting 9777 in Pr

mm.000

will clear the read only flag

10.4

Data block header information

Each data block stored on an SD Card has header information detailing
the following:
•

NV Media Card File Number

(11.037)

•

NV Media Card File Type

(11.038)

•

NV Media Card File Version

(11.039)

•

NV Media Card File Checksum

(11.040)

The header information for each data block which has been used can be
viewed in Pr

11.038

to Pr

11.040

by increasing or decreasing the data

block number set in Pr

11.037

. If there is no data on the card Pr

11.037

can only have a value of 0.

10.5

NV Media / SD Card parameters

Table 10-2 Key to parameter table coding

This parameter shows the number of the data block last transferred from
an SD Card to the drive. If defaults are subsequently reloaded this
parameter is set to 0.

This parameter is used to select a data block file by its file identification
number and can only be changed to values that correspond to files that
are recognised by the drive on the SD card or a value of 0.
When

NV Media Card File Number

(Pr

11.037

) corresponds to the

number of a data block file, Pr

11.038

, Pr

11.039

and Pr

11.040

are

populated with data relating to that specific file number.