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Pakscan IIS Technical Manual Issue 1.0
Publication S130E 39
8.5.4 Unit Address Setup Menu
The master station responds to more than one Modbus unit address on each of its serial communication links.
This allows the large amount of data the master station holds to be accessed and for additional security when
setting up sequences.
The ‘Masterstation’ address is the unit address used to access the field unit and master station data as
described in the Pakscan Modbus protocol documents.
The ‘Sequence/Interlock’ address accesses the sequence programmes and interlock data in the master station.
Reads and writes through this address programme and monitor the sequences and interlocks. It is not possible
to access the Pakscan data through this address.
Commands available:
- Set up the Pakscan data Modbus address
- Set up the Sequences programme access address
- Return to previous menu
Valid Modbus addresses are from 1 to 247 inclusive. It is recommended that the Sequences address is set high
in this range so as not to conflict with the control and acquisition addresses used for Pakscan when a number
of master stations share a common data highway.
1
2
MENU
1>Masterstation
Address for Host Comms
= 1
2>Sequence/Interlock
Address for Sequence Programmes
= 128