Yaskawa Remote Serial Communication Controller LAN Node PCB for use with Microtrac DSD LAN - Manual (Page 12)

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The RDU # indicates which Remote node
channel is to receive this information.
The BOTTOM LINE ASCII TEXT is the
legend for the data; the first character of the
string is at offset 2.
The TOP LINE ASCII TEXT contains the
drive name and the units for the data; the first
character of the string is at offset 18.
The VALUE contains the initial value of
the data; a logic 0 is represented by VALUE eual
to 0, and a logic 1 is represented by VALUE
equal to 0FFH.
Display Logic Value Response
(02BH)
This message is sent from the drive to the
Remote node and channel when the data
changes and at regular 4 second intervals until
the display is aborted. If the Remote node does
not receive an update within 5 seconds,
appropriate action should be taken, because the
last received data may not be valid.
[ MSG TYPE = 02BH | RDU # | VALUE ]
0 1 2
The RDU # indicates which Remote node
channel is to receive this information.
The VALUE contains the most recent
value of the data; a logic 0 is represented by
VALUE equal to 0, and a logic 1 is represented
by VALUE equal to 0FFH.
RDU Logic Value Change
(02CH)
This message is sent from a Remote
node to a drive when an RDU wants to change
the value of a logic parameter on the drive. This
message will only be sent after the RDU's
ENTER key is pressed.
[ MSG TYPE = 02CH | CHANNEL # |
SUBCHANNEL # |
0 1 2-3
RDU # | VALUE ]
4 5
The CHANNEL # must be 065H.
The SUBCHANNEL # must be the
desired Control Display Unit (CDU) Function
Number defined in the PAC diagram. The msb of
the SUBCHANNEL # is at offset 2.
The RDU # indicates which Remote node
channel the information is coming from.
The VALUE contains the desired new
value of the parameter; a logic 0 is represented
by VALUE equal to 0, and a logic 1 is
represented by VALUE equal to 0FFH.
Numeric Update
(030H)
This message is sent from a drive to a
Remote node to keep the drive's numeric output
updated, after the drive sends a Remote Numeric
Output Allocation Request message. As long as
the drive is powered up, it will continue to send
this message at regular intervals and when the
data changes. If the Remote node does not see
a Numeric Update message within the prescribed
time given in the Output Allocation message,
then it should take appropriate safe action (i.e.
set the output to 0).
This message is also sent from a Remote node
to the drive to keep the drive's numeric input
updated, in response to a Remote Numeric Input
Configure message. If the numeric value of the
input changes, then a LAN message must be
sent. A LAN message must also be sent at
regular 4 second intervals fixed at the Remote
node; the drive expects periodic updates in
response to the Input Configure message, and
will take appropriate action if it is not updated
within 5 seconds.
[ MSG TYPE = 030H | CHANNEL # |
SUBCHANNEL # |
0 1 2
VALUE ]
3-6
The CHANNEL # is a byte representing
the selected channel of the Remote node.
RD 790-30