User manual

IEC61131 User and Reference Manual

April 22, 2008

230

Outputs

Type

Description

portIOLineStatus

Integer

Serial port I/O line status.

Bit 0 = state of CTS input

Bit 1 = state of DCD input

Notes

Extended addressing is supported only by the Modbus RTU and Modbus ASCII protocols.

Refer to the TeleBUS Protocols User Manual for further information on protocols.

For SCADAPack & Micro16 controllers:

Com3 is supported only when the SCADAPack Lower I/O module is installed. Com4 is

supported only when the SCADAPack Upper I/O module is installed.

To optimize performance, minimize the length of messages on com3 and com4. Examples of

recommended uses for com3 and com4 are for local operator terminals, and for

programming and diagnostics.

For SCADAPack 32 & SCADAPack 32P controllers:

Com3 is supported only when the SCADAPack Lower I/O module is installed. To optimize

performance, minimize the length of messages on com3. Examples of recommended uses

for com3 are for local operator terminals, and for programming and diagnostics.