Chapter 3 Program Tools 59
SG2 system error
After power on, SG2 keep detecting the running state. Once system error occurred, the error code will display on
LCD. At the same time, SG2 will stop or just give error-warning base on the error type. Error types are show in the
table below:
Error code Explain Error action Why and How
ROM ERROR System ROM/Flash memory check
error
SG2 STOP If the version of the firmware is older
than 3.4, update to 3.4 or newer; then
if the error occurs again, contact with
suppliers
Vpd ERROR Power down circuits check error SG2 STOP Voltage is too low; apply the
appropriate voltage
PROG ERROR Ladder / FBD code invalid in
EEPROM.
SG2 STOP Download the user program and try
again.
LOGIC ERROR FBD code logic check error SG2 STOP There is same logic error in the user
program, modify it and try again.
EXT. ERROR Expansion I/O error (When disable I/O
alarm in “SET” of the main function,
The alarm cannot appear.)
SG2 STOP Extend module set number is not same
with the actual number, check the
system set.
COMM ERROR RS485 type communication error Warning only V type module communication error,
check the COMM protocol.
RTC ERROR RTC check or work error Warning only Contact with suppliers.
EMPTY PACK Memory pack is empty, when reading
from the memory pack.
Warning only No memory pack or there is no user
program in the memory pack, check
the memory pack.
MEM.ERROR Memory packs check error, when
writing to the memory pack.
Warning only Memory pack is broken or no memory
pack, check or change it.
T.ERROR The type is not matching when reading
program from the memory pack.
Warning only The type of the user program in the
memory pack does not match with
current one.
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