Schneider Electric Modicon BM85 - Manual (Page 77)

Configuring the Programmable Models 890 USE 103 00 67
4.8 Indicator Codes During Downloading
During downloading or internal testing, the four serial ports are disabled
and their indicators are used to show system status and error codes.
Indicator layouts are shown in Figure 22.
4.8.1 Normal Download Codes
The normal codes appearing during downloading are:
Indication Meaning
Port 4 –– Flashing two times per second Ready for downloading
Port 3 –– ON intermittently Receiving download from host
Port 2 –– ON (combined with port 3) Writing to BM85 RAM
Port 1 –– ON (combined with port 3) Erasing BM85 RAM
4.8.2 Error Codes
If an error occurs during downloading, or if the user calls the exit()
routine, the BM85 displays an error pattern in its four indicators.
The error pattern produces two 4-bit codes for two hexadecimal digits.
First, the indicators show a steady pattern for one second, indicating the
upper digit. Then they show a flashing pattern for one second with the
lower digit. The continuous and flashing patterns alternate repetitively.
Port 4 is the most significant bit in each code.
Indicators Pattern Hexadecimal Digit
4 – 3 – 2 – 1 Steady Upper digit
4 – 3 – 2 – 1 Flashing Lower digit
Error Code
(Hexadecimal)
Meaning
F1 BM85 kernel is reloading
F4 Program or task returned to BM85 bootstrap
F8 Program or task called abort()
FD Could not extend heap – program called malloc() or equivalent
and had insufficient memory
FE Could not create heap – not enough memory below code area
FF Not enough memory to copy program to RAM area