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IP258
52
An obvious precaution in the above procedure after loading the WORKING register with the current
MSM400 control unit data, is to transfer this data to the SAFE register in case the OFF-LINE sorted
new programme does not give the expected result – if necessary the MSM400 can be restored to its
original programme status by transferring the SAFE register data to the WORKING register.
The OFF-LINE register is retained when the communicator is disconnected from the loop or powered
down. It is only wiped when a new set of data is transferred to the OFF-LINE register from the
WORKING register.
Only one set of parameters can be stored in the OFF-LINE register at once.
DEFAULT REGISTER
This is the register of all the normal ex factory settings for the MSM400 Control unit. It is a useful
start or reference point for programming any control unit, since the values set in each parameter are
known and only those that need The screens showing the Transfer functions of data between registers
provide step by step instruction for achieving such data transfer . There are also facilities for allowing
the normal interface between the Psion Organiser and a printer or personal computer to provide
output of the MSM400 programme data.
The options presented on the LCD are amended when the SMART Communicator senses that a loop
is not present or the Interface unit is not plugged into the Psion. In such cases OFF-LINE operation is
offered or selected automatically. After changes to the PROGRAM screens which modify data in the
WORKING Register, these changes must be saved in the OFF-LINE Register or to a Data File using the
TRANSFER function.
b) Loop transfers
The BACK-UP selection on the main FUNCTION menu allows manipulation of the data held in the
various registers. Since all transfers are to or from the WORKING Register, the initial screen
SELECT DATA SOURCE
Safe Off Line
Working Defaults
File
Immediately transfers data to the WORKING Register if SAFE or OFFLINE are selected. If the
source is a Data File then a location and a File name are prompted for and the data is transferred to
the OFFLINE Register followed by a transfer from OFFLINE to WORKING. This final transfer can be
prevented by pressing “N” when asked to accept that the output may be changed. If the data source
is the WORKING Register, the screen prompts for a full upload if any parameters have not yet been
read then asks for a destination decision.
SELECT DATA
DESTINATION
Safe Off-line
File
To know where to place the data. Transfer to a Data File will prompt for a location and a file name.
The location is either the internal memory at A or a Data or Rampak in the upper side slot which is B.
The filename can be up to 8 characters long. In this case the WORKING Register remains unchanged
after the data transfer.
Please note that Parameters in the range P44 to P69 are not transferred to the WORKING Register in
any BACK-UP data transfer. These parameters are left as set up by the Service Engineer for that
particular control unit.