Yaskawa Modicon 800 Series Remote I/O Network for use on Microtrac LAN - Manual (Page 21)

4 OPERATION
20 PLC Gateway Status
5/24/96
display meaning
PUPn Displayed after the n = 1 During this stage the PLC
gateway has gateway broadcasts a power-up
successfully message across the MicroTrac
completed LAN. Also, if the PLC
initialization and is gateway has returned to the
ready to receive PUP sequence because of an
messages from the "ECOM" error (see ECOM
network. message description) and
communication has been
re-established, then internal
tables are also cleared.
n = 2 During this stage, the PLC
gateway is decoding allocation
messages (types 10, 11, 12, 13
and 2D) and setting up
simulated drops on the
interface card. A list of all
the drops requested via the
allocation messages is also
made. If after four seconds
no allocation messages are
received, then the PLC
gateway proceeds to the next
step.
n = 3 During this stage the PLC
gateway checks each drop on
its list and makes sure the drop
has received configuration
information form the Modicon
PLC. If not, an "ECdd"
message is displayed, where
"dd" is the drop number of the
drop that has not responded.
If all drops on the list are
configured, then the gateway
issues another power-up
message across the network
and enters the RUN stage.
PLC Gateway
Status
(continued)
RD 3004-20