
IEC61131 User and Reference Manual
April 22, 2008
Initialize modem status codes
Bad configuration error occurs when an incorrect initialization string is
sent to the modem. This usually means the modem does not
understand a specific command in the initialization string.
The controller serial port is not set to RS232 Modem.
Initialization error occurs when the modem does not respond to the
initialization string and may be turned off.
Call aborted by the program. This will occur if the enable input goes
OFF before a modem connection occurs.
“Serial port is not available” error occurs when the function block
attempts to use the serial port when another communication function
block, C program or an incoming call has control of the port.
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