CWPAC
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Technical Specifications
Communications
The ControlWave PAC supports up to seven
communication ports. The base CPU module has
two RS-232 serial ports and one Ethernet port. Two
additional RS-232 or RS-485 serial ports and two
additional Ethernet ports are optional.
Communication Protocols
ControlWave PAC supports BSAP (Bristol Standard
Asynchronous Protocol), Modbus, DF1, CIP, DNP3,
and serial ASCII communication protocols as
standard features. ControlWave PAC also supports
the following Modbus protocols:
Modbus serial and TCP/IP Open Modbus
(Ethernet)
Master and Slave
Modbus RTU and ASCII
Function Codes 1–7, 8, 15, and 16
Integer and IEEE 4-byte floating point
Coils
Inputs and Outputs
Input and output (I/O) modules are designed to
maximize usability while minimizing installation,
maintenance, and system down-time costs. A pull-
down door provides front panel wiring terminal
access for technicians. The bezel and the
terminations can be easily removed from the I/O
module to make wiring even easier. In addition, a
wide range of applications is supported by the
availability of both local terminations and remote
DIN-rail terminations.
To minimize field wiring and eliminate the need for
marshalling strips, the analog input (AI) and discrete
input (DI) modules are capable of supplying loop
power to two-wire transmitters and dry contacts.
Status indicators offer instant visual notification of
I/O conditions. Each I/O module has a two-color
Pass/Fail LED that displays the online diagnostic
status. Discrete I/O modules provide status LEDs
for each point on the module. AI modules provide
two LEDs on each input point to indicate input
under/over range conditions.
The ControlWave PAC supports a wide variety of
I/O modules. Available I/O modules include:
Analog Input (AI) module with 8 or 16 points
Analog Output (AO) module with 8 points
Discrete Input (DI) module with 16 or 32 points
Discrete Output (DO) module with 16 or 32
points
Resistance Temperature Detector (RTD)
module with 4 points
Thermocouple (TC) module with 6 points
UDI Counter module with 6 points
Note:
Modules are hot-swappable. All I/O is frozen
for 300 milliseconds when any module is
replaced.
Remote Termination Modules
The remote termination option for the ControlWave
PAC modules provides a convenient alternative to
the standard direct connect termination. All remote
termination modules are standard DIN-rail
mountable, and connect to the I/O module with pre-
wired connector cables. To simplify installation, all
I/O modules use the same cable.
I/O Expansion Rack
The I/O Expansion Rack allows for the addition of
I/O modules to multiple local and remote mounted
racks. The I/O Expansion Rack consists of a 4- or 8-
slot ControlWave chassis. This chassis contains an
Ethernet communication engine dedicated to
communications between the main processor and
the I/O Expansion Rack. The communication engine
also supports battery backed RAM to retain output
values during short power outages.
The I/O Expansion Rack is connected to the main
ControlWave via an Ethernet physical link using
TCP/IP. The process control application program
resides in the main ControlWave. The main
ControlWave controls both local I/O as well as the
I/O located in the I/O Expansion Rack.
ControlWave Redundant Systems
Redundant systems are ideal for use in critical
processes and harsh applications that require
maximum operational readiness and system
availability. The ControlWave PAC redundant
systems are designed to prevent a single point of
failure from shutting down the entire system. Two
types of redundant systems are available for the
ControlWave PAC: the redundant process control
and communications system, and the redundant
input/output (I/O) system. For more information on
the ControlWave PAC redundant systems, refer to
Technical Specifications CWPAC:RDN
.
Key Switch
The ControlWave PAC is available with a three-
position front panel key switch. The front panel key
switch provides a high level of manual security by
controlling three modes of operation.
In Run Mode, the ControlWave PAC rejects any
attempt to download or modify the running program,
either locally or over the network.