Automatic control function programming manual ladder language

12.5 Read the Status of a Serial Line comreg
Syntax
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comreg(portno)
portno: Communication port number.
Operation
Returns the general state of serial line portno.
! CAUTION
When initialising a line of the CNC processor card (line 2 or 3), it is necessary to call
function comreg() in a task %TF.
Return code
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Transmission in progress
Transmission error
Initialisation completed
Transmission stopped (CTS = 1)
Reception in progress
Not significant
Not significant
Monitor buffer full
Image of RTS (1 --> inactive)
Image of CTS (1 --> inactive)
Image of DCD (1 --> inactive)
Image of DSR (1 --> inactive)
Format error
Parity error
Overrun error
Characters available in the buffer
monitor