Product Data Document
420DS-6c / D301311X012
January 29, 2009 - Page 9
Bristol
®
ControlWave
®
Express
Remote Automation Solutions
Website: www.EmersonProcess.com/Remote
Supports OPC Browse interface•
Supports both serial comm and IP Ethernet •
connections
Supports COM/DCOM & OLE Automation
•
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 informa-
tion to the plant oor technician, operator, engineer,
supervisor and corporate management, even exter-
nal customers.
Communication Protocols
Like all of Emerson’s Bristol products, ControlWave
supports BSAP (Bristol Standard Asynchronous
Protocol), Modbus, DFI, CIP, DNP3, and serial
ASCII as standard functions.
These protocols are implemented in Flashware so
no additional hardware is required to use any one or
a combination of all protocols.
BSAP Protocol
BSAP is widely accepted as providing exceptional
data integrity and greatly simplies communication
between controllers. BSAP is provided with interfac-
es for Master/Slave, vertical networks, and Client/
Server, horizontal networks. In either case, variable
lists are created in each controller 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-
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 is often considered a de-facto standard pro-
tocol because of its broad usage as either the pri-
mary 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 addi-
tion there are considerations regarding supported
function codes, oating point values and byte order.
Bristol products support 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 •
