Flash Proms Containing Software For The Main And Communication Processors; Installation Test Procedure; Circuit Board Replacement - ASCOM T942C Installation Manual

Installation Guide
T942C and T942C/2 Central Unit
2.4.7

FLASH PROMs Containing Software for the Main and Communication Processors

1 Press the FLASH PROMs containing the software for the main processor, onto IC-
socket IC13.
2 Press the FLASH PROM containing the S942C software for the communication
processor, onto IC-socket IC54.
2.5

Installation Test Procedure

S942C software
Energize all the units in the system. Function indicator LED01 on T942C/2 should light red
for about 1 second and then change to a flashing orange light.
Function indicator
Figure 30. Central Unit T942C/2
At a start-up the Central Unit begins with a short self test for a few seconds. The function
indicator indicates this by short blinks at one second intervals. The parameter list in the
FLASH PROM is copied to the memory.
If no faults are detected, the Central Unit then makes a survey of the modules connected to
the data buses. The function indicator blinks rapidly (orange - 5 times/second) until all data
buses are surveyed. After this the function indicator lights steadily.
If it continues to indicate with a steady red, check that supply voltage is 12.5 V DC
Flashing indicates a fault as follows:
Colour
red
green
red
*All T942C/2 software is licenced and must be ordered.
2.6

Circuit Board Replacement

Refer to T942C, see
16 April 2015 / Ver. G
ON OFF
100 ms 800 ms
800 ms 100 ms
1 s 1 s
1.6 Circuit Board Replacement
Fault
Incorrect software licence*
Parameter fault
Watchdog reset
on page 19.
TD 91684GB
±
10%.
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