Control Unit MDC
VTK-TR-BA-072e-1 - User Manual MDS 358X Series
4.6 Memories of the MDC
The MDC contains several memories to save parameter setups.
The first one is the RAM (Random Access Memory). Here the parameters of the current dispense
process will be saved. This memory will be erased when the controller is switched of or
disconnected from power. When starting again, the MDC will load the first of eleven parameter
memory sets saved on the EEPROM (Electrically Erasable Programmable Read Only Memory) into
the RAM. This first parameter setup is also called the “EEPROM current working parameter
configuration”, or short “working configuration” or “EEPROM working configuration”.
The parameter set in the EEPROM working configuration is usually the same as the parameter set
saved in the RAM memory. When using the keypad to program the controller, the two memories
will always have the same contents. The only way to create a difference in the parameter set
saved in the RAM and in the EEPROM working configuration is by using some special commands
through the RS-232C.
The remaining ten EEPROM memory sets can be used to save different parameter setups when
programming the controller through the keypad interface (use the command [save]).
In order to change the values saved in the EEPROM working configuration you may use the MDC
keypad (enter the parameters in the menu “Pulse Parameters”, then press [enter]).
Or you may use one of the following commands via RS-232C:
• TRIGGER:ASET:<Rising>,<Open Time>,<Falling>,<Needle Lift>,<Number of Pulses>,<Delay>,1
• STRIGGER:ASET:<Rising>,<Open Time>,<Falling>,<Needle Lift>,<Number of Pulses>,<Delay>,1
All values transmitted to the control unit by one of the following commands will not be saved in
the EEPROM working configuration.
• TRIGGER:ASET:<Rising>,<Open Time>,<Falling>,<Needle Lift>,<Number of Pulses>,<Delay>
• STRIGGER:ASET:<Rising>,<Open Time>,<Falling>,<Needle Lift>,<Number of Pulses>,<Delay>
Instead it will remain in the RAM memory until erased by another RS-232C command, or when
the control unit is switched OFF and the EEPROM is read out into the RAM during restart. The
reason for having these two different types of commands (the distinction is the “1” at the end) is
that it takes up to 1 sec to save the parameter set in the EEPROM.
On top of the working configuration and the ten parameter setups there is another parameter
set-ting saved in the software on the EEPROM. This is called the “factory setting”. It cannot be
changed by the user. It may be loaded to the working configuration and the RAM memory after
major disturbances of the system.
Additionally there is the possibility to save combinations of setups, so called “Scenarios” (see
paragraph 7.9 "Scenarios", page 70).
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