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Product Data Document
420DS-1k
July 16, 2007 - Page 13
Bristol
®
ControlWave
®
PAC
Remote Automation Solutions
Website: www.EmersonProcess.com/Remote
Primary and Background polling scheme
OPC Alarm & Event Server support
ControlWave Open Network Connectivity
By embracing the open system network technolo-
gies available through TCP/IP, Ethernet, OPC, and
Microsoft DNA, as well as pseudo standards such
as Modbus and Open Modbus, ControlWave can
provide a total Process Automation Management
Solution for in-plant LAN based networks and WIde
Area Network SCADA systems.
With the exceptional connectivity provided by the
ControlWave network, access to real-time data and
operating conditions, historical data, maintenance
and performance data are all available to the global
network. ControlWave provides the needed infor-
mation to the plant oor technician, operator, engi-
neer, supervisor and corporate management, even
external customers.
Communication Protocols
Like all of Emerson’s products, Bristol ControlWave
supports BSAP (Bristol Standard Asynchronous
Protocol), Modbus, DFI, CIP, DNP3 and serial ASCII
as standard functions. These protocols are imple-
mented in Flashware so no additional hardware
is required to use any one or a combination of all
protocols.
BSAP Protocol
All Emerson’s Bristol Network 3000 and
ControlWave RTU and controller products support
BSAP protocol. BSAP is widely accepted as provid-
ing exceptional data integrity and greatly simpli-
es communication between controllers. BSAP is
provided with interfaces for Master/Slave, vertical
networks, and Client/Server, horizontal networks. In
either case, variable lists are created in each con-
troller that are easily passed from server to client or
slave to master.
BSAP meets the denition of an industry-standard,
open architecture protocol because it conforms to
ISO standards 2629, 1745 and 2111, it is not propri-
etary in that Emerson does not charge a license fee
and makes the protocol and documentation avail-
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able to anyone.
While BSAP is an open protocol, the added func-
tionality of the messages provide much more capa-
bility than is found in other networks.
Global time-synchronization
Time-stamped Alarm reporting
Historical archive data transfer
Audit le transfer
On-line program editing
Diagnostics
Communication statistics
Modbus Protocol
Modbus - Modbus is often considered a de-facto
standard protocol because of its broad usage as
either the primary or a secondary offering in many
measurement and control related products. Even
with its common use, Modbus protocol actually
has many variations. Consider Modbus RTU and
Modbus ASCII, Master & Slave, Serial and TCP/IP
Open Modbus. In addition, there are considerations
regarding supported function codes, oating point
values and byte order. ControlWave supports the
following:
Modbus serial and TCP/IP Open Modbus
(Ethernet)
Master and slave
Modbus RTU and ASCII
Modes 1 - 7, 8, 15 & 16
IP modes 51, 52, & 53
Integer and IEEE 4 byte oating point
Generic Serial Interface
The Generic Serial Interface is a user program-
mable Master and Slave protocol used to send and
receive messages typically with third party serial
ASCII devices. This protocol can be used to inter-
face with such devices as message boards, card
readers and many measurement devices.
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