Yaskawa Remote I/O Controller LAN Node PCB for use with Microtrac DSD LAN - Manual (Page 3)

OPERATIONAL DESCRIPTION
NODE/CHANNEL/SUBCHANNEL
DEFINITION
The PAC language defines a
particular Input or Output by use of a Node,
a Channel, and a Subchannel. When
concerning an RIO, the Node, Channel, and
Subchannel are defined as follows:
NODE: RIO LAN Node Address
Switch Setting
CHANNEL: 0 — The Remote I/O LAN
Node PCB (RIO)
1 — Remote I/O board with
jumper at CH 1.
2 — Remote I/O board with
jumper at CH 2.
3 — Remote I/O board with
jumper at CH 3.
4 — Remote I/O board with
jumper at CH 4.
5 — Remote I/O board with
jumper at CH 5.
6 — Remote I/O board with
jumper at CH 6.
SUBCHANNEL: The Subchannels of
Channel 0 (the RIO ) are defined
as follows:
0 — AI0, Analog Input 0
1 — AI1, Analog Input 1
2 — AI2, Analog Input 2
The Subchannels of the Remote I/O
boards are dependent on their configur-
ation. The definitions of the Remote I/O
board Subchannels are beyond the scope of
this document, however, they can be found
in the User Referecne Sheet for desired
Remote I/O board.
LOGIC INPUTS
Logic inputs are any bit oriented
input, such as the state of a push button.
Any drive connected to the LAN may request
to be updated with the state of a logic input.
Any time a logic input changes state, a LAN
message is sent to each of the drives that
had previously asked to be updated. The
drives that had previously asked to be
updated will also be updated at 4 second
intervals, for redundancy in case of a
previous communication failure.
Some DC logic inputs may be
specified as source or sink. An input that is
specified as source means that an input is a
logical 1 (High) when the input is at the +24
VDC level. An input that is specified as
sink is a logical 1 (Hi) when the input is
grounded. The way that logic inputs may
be specified as source or sink is dependant
on the type of Remote I/O board that is
being utilized and is beyond the scope of
this document. The User Reference Sheet
on the desired Remote I/O board will
explain how to specify source or sink.
LOGIC OUTPUTS
Logic outputs are any bit oriented
output, such as that to turn on a lamp.
When first powered up, the RIO will drive all
of the outputs to 0. The RIO will also
announce its power-up state onto the LAN
so that any concerned drives may allocate
outputs and request inputs. Drives will also
allocate outputs and request inputs when
they are first powered up in case they are
powered up after the RIO is powered up
(thus not seeing the RIO power-up
announcement on the LAN). The first drive
to allocate an output will have exclusive
rights of controlling the output. Any drives
trying to allocate an already allocated
output will receive an error message and
not be allowed to control the output.
When specifying a logic output, an
output time needs to be defined. The
output time is entered in number of whole
seconds, not to exceed 36. An entered time
of 0 means to never time out. This output
time is used by the RIO to determine if the
drive is communicating with the RIO. Each
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