1-8
Series 90™-30 PLC LONWORKS® Bus Interface Module User's Manual
–
June 1997
GFK-1322A
1
Functional Characteristics
Most parameters are supported to the limits of the L
ON
T
ALK
Protocol and the L
ON
W
ORKS
node
limits.
Table 1-6. LBIM Functional Characteristics
Microprocessor
Neuron chip running the Microprocessor Interface Program
(MIP) with 80C186 host processor.
Maximum number of network
variables supported by LBIM
244 (240 of these can be configured by user)
The maximum number of network variables depends on the
size and type of the variables, limited by the LBIM’s PLC
register space (2 Kbytes each direction) and the configuration
memory budget.
Standard Network Variable Types
(SNVTs)
Supports L
ON
W
ORKS
SNVTs as listed in The SNVT Master
List published by Echelon corporation as of June 1996. Each
network variable must be no more than 31 bytes in length.
PLC memory types supported
%I, %Q, %AI, %AQ
Configuration
Configuration of the LBIM consists of defining network variable types and mapping them into the
PLC reference space using the IOPEN configuration software. Network Variable types mapped to
memory types %I or %Q must be of type SNVT_switch, SNVT_lev_disc, or other bit-represented
types. Once the LBIM’s network interface has been configured, network configuration and
binding can be performed as for any other
L
ON
W
ORKS
node. Also, after the LBIM’s network
interface has been configured, the Series 90-30 backplane CPU must be set up to recognize the
LBIM as a foreign smart module with a reference map required to implement the network
interface. For details on configuration, refer to Chapter 4.
Diagnostics
The LBIM does not report faults to the PLC. Module errors cause the LBIM to reset. If an
acknowledge NV update command fails, it is up to the destination device to assume that a fault
has occurred. Configuration errors will cause the LBIM to not be mapped.
For troubleshooting and diagnostics information, refer to Chapter 5.
Summary of Contents for 90-30 PLC
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