Instruction Set
Relay
3-3
relay instructions continued...
Instruction
Description
Immediate Input
IIN
This instruction updates a word of input–image bits before the next normal input-image update.
For a local chassis, program scan is interrupted while the inputs of the addressed I/O group are
scanned; for a remote or ControlNet chassis, program scan is interrupted only to update the
input image with the latest states as found in the remote I/O or ControlNet buffer.
Immediate Output
IOT
This instruction updates a word of output–image bits before the next normal output-image
update. For a local chassis, program scan is interrupted while the outputs of the addressed I/O
group are scanned; for a remote or ControlNet chassis, program scan is interrupted only to
update the remote I/O or ControlNet buffer with the latest states as found in the output image.
01
(IIN)
01
(IOT)