GE 90-30 PLC, User Manual

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4-2 Series 90™-30 PLC LONWORKS® Bus Interface Module User's Manual – June 1997 GFK-1322A
4
Overview
The LBIM is configured using the I/Open LBIM Configuration program for Microsoft Windows.
Using this utility, a configuration file is created. This file is in the external interface file format
(.XIF) for L
ON
W
ORKS
devices. The file contains node and network variable information along
with the register mapping information needed by the LBIM to configure the interface. The .XIF
file is downloaded to the LBIM by the configuration software over the L
ON
W
ORKS
network using
L
ON
M
ARK
File Transfer Protocol. The following general procedure is used to configure the
LBIM.
Step A. Determine what network variable types will be needed to interface with the PLC.
Example:
Inputs Outputs
SNVT_temp 3 SNVT_temp 1
SNVT_count 2 display 1
SNVT_freq_f 1
SNVT_temp_f 1
NVO 7, SNVT temp f
a45643
NVO 1, SNVT count
NVI 1, display
Node 1
NVO 1, SNVT temp
NVO 3, SNVT temp
NVO 4, SNVT freq f
NVI 2, SNVT temp
NVO 5, SNVT count
NVO 6, SNVT temp
Node 2
Node 4
Node 3
Figure 4-1. Example: Determining What Network Variable Types are Needed