Applies To:
  • CitectSCADA 1.00 1.01 1.10 1.11 1.20 2.00 2.01 3.00

How do I use the Satt Control COMLI Serial Interface? 

The serial drivers PCxI, MCxI, COMxI or COMx may be used.

Setup the COMLI with the communication parameters. Slave mode, 19200 baud, 8 data bits, Odd parity, 1 stop bits, binary transmission code.

I/O Devices form
Name: User supplied unique name
Number: Network wide I/O device number
Address: PLC unit number 1 to 247
Protocol: COMLI
Port name: Use the "Port name" from the Ports form

Standard citect.ini options

MaxPending = 2
Block = 24 bytes
Retry = 0
Delay = 0
TimeOut = 3000 milliseconds
PollTime = 0
WatchTime = 30 seconds


  • COMLI.DLL - COMLI Driver for windows
  • COMLI.DBF - COMLI variable template

COMLI Variables

o I/O Bits, Digital.
Po I/O Bits as 16-bit word, Int.
Ru Register, Int.
AO Analog, Int.
TIME Time of day, String. 12 Characters.
Mu PLC Memory, Byte.
Su System Information, Byte.
Where o is an octal number, starting from 0.
u is a decimal number, starting from 0.
O is an octal number, divisible by 4, starting from 100.