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CN8-SWÔ UserÕs Guide
4-2
4.2 Configuring Communication Parameters and Assigning
Network Addresses in Controllers
4.2.1 Communication Parameters
Your goal is to make sure that:
· a l l t h e c o n t r o l l e r s t h a t s u p p o r t O m e g a P l u s p r o t o c o l h a v e t h e i r
c o m m u n i c a t i o n p a r a m e t e r v a l u e s s e t t o t h e i r d e f a u l t s
· a l l t h e c o n t r o l l e r s t h a t s u p p o r t t h e o r i g i n a l O m e g a p r o t o c o l h a v e t h e i r b a u d
r a t e s e t t o m a t c h t h e C N 8 - S W s o f t w a r e , a n d t h e i r o t h e r p a r a m e t e r s s e t t o 8
d a t a b i t s , n o p a r i t y , 1 s t o p b i t .
The CN8-SW software is designed to recognize Omega Plus controllers using the
controllersÕ default communication parameters. Therefore, if any Omega Plus controllerÕs
communication parameters have been changed from the factory defaults, return the
communication parameter values to their defaults. The default baud rate depends on the
controller series, but all use 8 data bits, no parity, 1 stop bit.
· The network baud rate will be 9600 if you do use the automatic Òfind controllersÓ
function. The software will change each Omega Plus controllerÕs baud rate to
9600.
· The network baud rate will be determined by the rate you configure for the CN8-
SW software if you do not use the automatic Òfind controllerÕs functionÓ.
The baud rate of controllers that support the original Omega protocol can be read, but not
changed, by the CN8-SW computer. Therefore, you must use the front panel display and
buttons to set the baud rate in these controllers to 9600 (and make sure the other
communication parameters are set to 8 data bits, no parity, 1 stop bit) before you use the
automatic recognition process described in 4.4.
· T h e c o m m u n i c a t i o n p a r a m e t e r s i n n e w ( Ò o u t - o f - t h e b o x Ó ) O m e g a P l u s
c o n t r o l l e r s w e r e s e t t o t h e i r d e f a u l t s a t t h e f a c t o r y . If t h e c o n t r o l l e r s a r e
n e w , y o u c a n p r o c e e d t o c o n f i g u r i n g n e t w o r k a d d r e s s e s ( s e e 4 . 2 . 2 ) .
· I f n e c e s s a r y , f o l l o w t h e i n s t r u c t i o n s p r o v i d e d i n t h e c o n t r o l l e r m a n u a l s t o
p o w e r u p t h e c o n t r o l l e r s , a n d u s e t h e f r o n t p a n e l d i s p l a y a n d b u t t o n s t o s e t
a l l t h e O m e g a P l u s P r o t o c o l c o n t r o l l e r s t o t h e i r d e f a u l t c o m m u n i c a t i o n
p a r a m e t e r v a l u e s ( a n d a l l O m e g a P r o t o c o l c o n t r o l l e r s t o 9 6 0 0 , 8 d a t a b i t s ,
n o p a r i t y , 1 s t o p b i t ) , t h e n g o o n t o 4 . 2 . 2 .