Johnson Controls York AYK550, User Manual

Page: 172 / 279

,.
YORK, A Johnson Controls Company
%**8 = 9);
and
REF
2). Note, fieldbus references are bipolar, that is they can be positive or
negative.
F%2,2=2'=9 =,
&?
The N2 Fieldbus connection to the AYK550 drives is based on an industry standard
RS-485 physical interface. The N2 Fieldbus protocol is a master-slave type, serial
communication protocol, used by the Johnson Controls Metasys® system. In the
Metasys architecture the N2 Fieldbus connects object interfaces and remote
controllers to Network Control Units (NCUs).
The N2 Fieldbus can also be used to connect AYK550 drives to the Metasys
Companion product line.
This section describes the use of the N2 Fieldbus with the AYK550 drives’
connection and does not describe the protocol in detail.
&!%24
%@, #,, 7 *!4 =#= 7
1003
DIRECTION
1 (
FORWARD
)
1003
DIRECTION
2 (
REVERSE
)
1003
DIRECTION
3 (
REQUEST
)
100%
Max. Ref
-100% -163%
163%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
100%
Max. Ref
-100%
-163%
163%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
100%
Max. Ref
-100% -163%
163%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference