new Ethernet fieldbus controller, the first offering using WAGO Corp.'s second
generation Ethernet platform, can process 1,000 instructions in just 235 µS. It
also offers upgraded memory capacity for PLC programs and web applications, along
with an integrated dual-port Ethernet switch.
"We are both upgrading the processor and
offering enhanced features in our new Ethernet products," says Charlie Norz,
I/O System Product Manager for WAGO. "Ethernet 2.0 is compatible with our existing
platform and still uses a rackless design, which means the I/O modules fit
together on a DIN rail and the user can easily add or subtract modules as
"We have upgraded our processor, so
that it is 100 percent faster than our existing products, and a new file system
on the controller enables the user to log more data or store web pages," says
Norz. "The new controller doubles the amount of available memory, offering 1
Mbyte of program memory and a 2 Mbyte file system."
The keys to the 750-881's fast processing
capabilities are a new 32-bit CPU and the upgrade in program memory. The Fast
File System supervises both a web-based management system and substantial data
logging, and e-mail capability (updates/alarms) is also provided for authorized
personnel. The 750-881's standard CoDeSys V2 programming environment is IEC
61131 compatible and features all five programming languages. The PFC supports
up to 250 I/O modules, and allows users to tailor solutions from among 400+
analog, digital and specialty modules.
The device's built-in Ethernet
switch with two ports provides the ability to daisy-chain communications and
eliminate the need for an external switch. It interfaces with standard network
protocols and provides unique support for both EtherNet/IP and MODBUS TCP. The
user can use either of these protocols independently, or both simultaneously.
The built-in switch streamlines costs and
system footprint by facilitating a line topology for fieldbus wiring,
eliminating additional switches and hubs. An onboard DIP switch configures the
last octet of IP address/assignment, expediting commissioning.
The fieldbus controller configures
automatically, creating a local process image which can include analog, digital
or specialty modules. Analog and specialty module data is sent via words and/or
bytes; digital data is sent bit by bit.
The two Ethernet interfaces and the
integrated switch allow the fieldbus to be wired in a line topology. This
eliminates additional network devices such as switches or hubs. Both interfaces
support Auto-Negotiation and Auto-MDI(X).
The DIP switch configures the last byte of
the IP address and may be used for IP address assignment (DHCP, BootP and
static). And while the controller is designed for fieldbus communication in
both Ethernet/IP and MODBUS networks, it also supports a wide variety of
standard ETHERNET protocols (such as HTTP, BootP, DHCP, DNS, SNTP, SNMP and
FTP). The integrated web server provides configuration and status information from
A new housing design departs from WAGO's
traditional architecture. The slotted housing optimizes heat dissipation while
maintaining a 0 - +55C operating temperature range and IP20 rating.
Certifications include UL 508, cUL, GL and CE.