Automation Direct D2-DCM, User Manual

Page: 26 / 83

Setting the Switches
16
Data Communications Module, 2nd Edition, 2/03
Setting the D2–DCM switches
The D2–DCM has two banks of dipswitches that allow you to select the communication
parameters necessary for your application. In quite a few cases, you may not have to change
the switches at all. The D2–DCM comes set from the factory for:
D
Direct NET Slave operation
D
9600 Baud
D
Station Address 1
D
Odd Parity
D
Hex Mode
If you’re using a host computer or operator interface as the master station you should set the
D2–DCM to match the master station parameters. Check the documentation that came with
your computer or operator interface panel to determine the available communication
parameters.
You’ll need to know the following things.
D
Baud rate
D
Parity settings
D Protocol required
Your operator interface must use one of the following protocols.
D
Direct NET
D
K-sequence
D
Hostlink ( Direc t NET was called Hostlink on the old TI
t
or Simatic
r
TI products.
Some Operator Interface manufacturers may still refer to it this way.)
D MODBUS

RTU
If you’re using the D2–DCM as a Direct NET interface, you’ll need to know whether the
D2–DCM is being used in a master station, slave station, or peer station. Once you’ve
determined how the D2–DCM will be used, proceed with the dipswitch settings.
Master – Slave Network Peer as Master Network
D2–DCM as Master
D2–DCM as Slave
D2–DCM as Peer D2–DCM as Peer
Host Computer or
Operator Interface
Connection
Direct NET Interface
Connection