Technical data

Installation & Operation Manual GM-TTT
Page 71
These data may be altogether written into different storage areas. These storage areas are
organised as follows:
Area “F”: factory settings of GM-TTT; these non-erasable data are stored in a ROM.
Area “S”: backup memory, which stores all changes made during current operation. These
data are stored in an EEPROM and are hence available after power-on.
Area “U”: user area, which permits to store a complete system setting separately. These data
are stored in an EEPROM as well.
Area “W”: actual working area for current operation. RAM area which changes with new
settings.
RESET: "W"
POWER ON:
USER RESET:
"U""F"
EEPROM
STORE + READ
PROM
"F"
"S"
FACTORY
SETTING
READ ONLY
"F"
"S"
"W"
"S"
SAVE
AREA
RAM
"W"
WORKING
AREA
RANDOM
USER STORE:
USER LOAD:
"U"
USER
AREA
"W"
"U"
"U"
"W"
The above diagram shows the storage areas and storage procedures:
1. After power-on “S“ is transferred to “W“ if “S“ has passed the plausibility check.
2. In case of a storage error, “F” overwrites “S“, then same proceeding as with 1. Functions
2. and 1. will also be executed with the menu function SET → FACTORY - reset.
3. In the menu function SET → U STORE the actual data may be stored separately.
4. In the menu function SET → U LOAD the actual settings may be overwritten with the stored
settings.
5. In the menu function SET → U RESET the user area is overwritten with the factory values.
The parameters of the time zones for timer A - F of the MTD system will be handled
separately. These parameters can be transferred between GM-TTT and an operational unit
of the MTD system. Programming is done at the operational unit of the MTD system only.
The non-volatile storage area of these parameters is checked after power-on separately
(see chapter “After Power-on“). This storage area can receive a RESET only at menu ZONE
- ... - RESET A-F (not by a FACTORY RESET). This storage area is not included in the ‘user
area’.