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Introduction
1-5
1.3 Overview of Setup Tasks
The following tasks must be performed in this sequence to use the CN8-SW application
successfully with an RS-485 network. The same basic process applies to using the CN8-
SW application to communicate with a single controller over an
RS-232 link. In the case of RS-232 links, the ÒnetworkÓ consists of only the controller and
the PC.
S t e p T a s k
S e c t i o n i n
t h i s M a n u a l
1 Connect the controllers to the network. 2
and controller
manuals
2 Connect the personal computer to the network. 2
3 Install the CN8-SW software and log in. 3
4 Change the password on the default account ÒMULTIÓ (not required, but
strongly recommended).
3
5 Set up operator accounts and assign passwords. 3
6 If any of the Omega Plus controllersÕ communication parameters have been
changed from the factory defaults, use the front panel of each controller to
set each controllerÕs configuration parameters to the defaults.
4
and controller
manuals
7
For controllers that support the original Omega Protocol, use each
instrumentÕs front panel to set the controller to use 8 data bits, no parity,
1 stop bit. Configure each controller to match the baud rate you plan to use
for the network. If you plan to use the automatic Òfind controllersÓ option
described in Step 11, set the Omega Protocol controllers to 9600 baud.
4
and controller
manuals
8 Use the front panel of all controllers (Omega Protocol and Omega Plus
Protocol) to assign a unique address (between 1 and 254) to each controller.
4
and controller
manuals
9
Configure the CN8-SW communication parameters and port selection. (The
CN8-SW communication settings will override, but not change, the operating
system settings for the selected port on your PC.)
4
10 Use the CN8-SW software to recognize each controller on the network
automatically. In the process, the CN8-SW software will set the baud rate in
all Omega Plus controllers to 9600. (By default, not all Omega controllers are
set to the same baud rate.)
3
4
11
Name the controllers (optional, but recommended). By default, each
controllerÕs name will be its network address.
4
12 Save the .MCS (CN8-SW system) file so that the process of recognizing the
controllers does not have to be repeated if CN8-SW is restarted.
4
13 Set up local alarms (optional).5
At this point you are ready to configure new controllers, or to begin monitoring process variables
with the CN8-SW computer.
To change setpoints, see Section 6.
To change controller mode, including use of Autotune, see Section 7.
3
You had to use the controller front panel in Step 8 to set the baud rate of controllers that support the
original Omega Protocol, because that protocol supports reading the baud rate, but not changing it.