User Manual

Technical Manual for Master Terminals of the Series IF 152x
Page 27
How to Erase and Initialize the RAM (Cold Boot)
The cold boot erases all the user data, initializes the C-RAM and sets the default values required for
operation. All the data must be reloaded.
A cold boot is required after:
• Initial operation (imperative)
• Change of the controller software depending on the respective instructions
The cold boot is carried out by means of the "cold boot switch" and the reset button, both to be found
on the MPU board (see graph 1).
The following graph shows the positions of the switches for warm (1a) and cold (1b) start.
1
J 10
J 6
J 7
J 8
J 2
J 11
J 106
+
-
J 1
R46
S
BAT
ON
Br. 11-14
Br.
31
33 34 32
Br.5
Br.29
Br.9
Br.27
Br.
103
Br.
104
J 112 J 104
J 110
ON
ON
ON
OFF
+
BAT
RUN
cold sw
ON
RES
LED
RTS
1a
1c
cold sw
ON
OFF
1b
RES
How to perform a cold boot:
# Open the housing of the terminal without removing any of the connecting cables.
# Set the cold boot switch on the MPU to ON (see graph 1b).
# Push the reset button on the MPU board (RTS and RUN-LED are off).
Wait while RAM test* is running. The test is finished when the RTS-LED stops blinking.
RAM test OK: Negative RAM test:
- RTS LED is flickering - RTS-LED off (RAM defective or insufficient C-RAM section)
# Afterwards, the cold boot switch must be set back to OFF.
$ Note: The cold boot switch must always be set back to OFF (see graph 1a) after a cold boot has been
carried out !!! Otherwise the C-RAM will be erased every time a power failure occurs, which means
that the booking data will be lost and the data required for operation will have to be reloaded from the
host system.
RESET
The actuation of the reset button or also a short voltage breakdown will cause the master terminal to
reset (warm boot). Stored data will not be erased or changed.
A RESET (warm boot) is required after:
• Interface parameters have been changed
• System failures