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18 - External units
18�7 Example – external units
18�7�1 Seneca expansion modules
Seneca is an Italian company that produces a range of modules
with inputs and outputs, using Modbus to communicate. If you
go to the Abelko web site you can download .gpss type deni-
tions for four Seneca modules. One of the modules has ve relay
outputs, one has ve digital inputs, one has four analogue inputs
and one has three analogue outputs. The type denitions can be
imported into a WMPro as described in 18.2.
Each module must be set to a unique
address, and this can only be done
remotely (from the WMPro). To help
you do this, a type denition called
CfgSeneca is provided. CfgSeneca is
used to set the address of a Seneca
module. You can use a DIP switch on
the module to set the module address
to 1 and the baud rate to 9600. This al-
lows the WMPro to communicate with
the module as a CfgSeneca unit, but
there must not be any other modules
running with the same settings in the system. To use a Seneca module, follow these steps:
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