SI-INTERBUS User Guide
23
Issue Number: 1
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6.4.6
Direct data mapping
By default, the cyclic data mapping parameters
MM.010
to
MM.029
are used as pointers
to specify the destination parameters for OUT data received from the Interbus master
controller, and the source parameter of IN data to be transmitted to the Interbus master
controller.
When direct data mapping is enabled (Pr
MM.009
= On), the cyclic data mapping
parameters are used as the actual source or destination parameters for the cyclic data.
Hence, IN data values read from Pr
MM.010
to
MM.019
are transmitted to the Interbus
master controller and OUT data values arriving from the Interbus master controller are
written directly into Pr
MM.020
to Pr
MM.029
.
6.4.7
Interbus operating status
The Interbus network activity can be monitored in the operating status parameter,
Pr
MM.006
.
When the SI-Interbus is communicating successfully with the Interbus master controller,
the operating status will give an indication of the number of cyclic data messages per
second that are being processed.
If Pr
MM.006
is a negative value, this indicates a non-operational state as shown in the
following table.
Table 6-4 Interbus operating status
If Pr
MM.006
shows a positive value, this value is dependent upon the Interbus network
communication speed, number of mappings and whether non-cyclic communications
are active or not.
Direct Data Mapping Enable
Pr
MM.009
Default
0 (Off)
Type
1-bit
Access
RW
Interbus Operating Status
Pr
MM.006
Default
None
Type
16-bit
Access
RO
Pr MM006
Description
> 0
Network healthy, displays the number of messages processed per second
0
Network health, no cyclic data transfer
-1
SI-Interbus has initialised correctly and waiting for the Interbus master to
initialise communication
-2
The SI-Interbus module reports an internal hardware fault
-3
Configuration error, invalid setting in the SI-Interbus configuration
parameters
