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Slave Polltable Setup
Once the Slave Device Types are defined by name (refer to the section called "Slave Device
Types Setup"), a set of registers can be associated with each device type. This set of
registers is called a Polltable.
Click on Configuration→Slave Polltable Setup.
This page shows which Modbus register ranges shall be polled for a particular device
type. You can select a device on the device tab and add new entries and remove existing
entries.
Figure 6.2: Example of a Slave Polltable Setup page
Modbus Function
The Modbus function code to be used for the Modbus transaction.
Start Reference
Defines the start register for the Modbus transaction. This number is 1-based
meaning the first Modbus register is identified as register 1.
Reference Count
Defines how many registers are to be read or written.
Poll Cycle
Defines the minimum time span between two consecutive Modbus transactions of
this type. Please note, that this is a minimum time and the actual cycle time may be
longer depending on the scheduling order of other Modbus transactions.
Offset
The offset defines where in relation to the start of this poll table the returned data is
to be stored. In most situations the offset is 0 for the first entry and then incremented
by the number of registers polled by the previous entry.
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UMMBDC200-2201
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