Reliance-57C328AutoMax Remote I/O Communications

Reliance-57C328AutoMax Remote I/O Communications

57C328

57C329

57C330

57C416

57C554

The AutoMax Remote I/O network is designed for master/slave

operation. The network is composed of two main parts: a number of

nodes (drops) and a transmission medium (coaxial or fiber-optic

cable).

There are two types of drops: master and slave. The master drop is a

Multibus ™ rack that contains at least one AutoMax or DCS 5000

Processor module and a Remote I/OCommunications module.

Slave drops can be:

Remote I/O Heads(M/N 57C328 and M/N 57C330)

Remote Drive Interface Heads(M/N 57C329)

Shark racks containing I/O modules and an AutoMax Remote I/O

Shark Interface module(M/N 57C554)

AutoMax racks containing AutoMax I/O modules and a Remote

I/O Communications module

IBM-compatible personal computers containing the AutoMax PC

Link Interface module(M/N 57C445). Refer to the AutoMax PC

Link instruction manual (J2-3011) for more information.

An AutoMax Remote I/O network can have a maximum of seven slave

drops. All five types can be mixed on the same network.

The drops are connected using coaxial cable or, when noise

immunity and total electrical isolation is required, fiber-optic cable.

The coaxial cable network is structured in a bus configuration. This

type of topology is characterized by a main trunkline in which

individual nodes are connected in a multidrop fashion as shown in

figure 1.1.

Figure 1.2 - A Typical Fiber-Optic Cable Remote I/O Network

The type of cable used (whether coaxial or fiber-optic) does not affect

the operation of the Remote I/O network protocols, application

software, or the operation of the Remote I/O Communications

module, Shark Interface module, Remote I/O Head,or Remote Drive

Interface Head.

The Remote I/OCommunications module in the master drop (drop0)

rack functions as the network's Remote I/O master. Master or slave

Remote I/O Communications modules may be installed in any slot in

the rack. Any number of Remote I/O Communications modules can

be installed in a master rack, each controlling a separate Remote I/O

network. See figure 1.3.

Figure 1.3-Multiple Remote I/O Network Connections (Coax)

The master initiates and controls all data transmissions on the

network by polling every slave drop in a round-robin sequence.A

slave drop's Remote I/OCommunication module, Remote I/O Head,

or AutoMax Remote I/OShark Interface module functions as an l/O

scanner: it reads data in from the input modules and writes data out

to the output modules. The data sent from the master drop to the

slave updates the status of the slave's outputs. The slave drop sends

the current status of its inputs back to the master.

Each Remote I/O Communications module contains a4K word

dual-port memory for storing the data that is transmitted over the

network. Dual-port memory is accessible to both the module and the

AutoMax Processor in the rack. In the master module, the dual-port

memory contains an image of the status of all the inputs and outputs

of the I/O modules in the slave drops. The application task that

controls the I/O associated with these l/O modules actually examines

the inputs and controls the outputs in the image area.

The Remote I/OCommunications module provides an RS-232

compatible serial port and the associated software needed to monitor

the status of the drops. An ASCIl terminal or a personal computer

running terminal-emulation software are also required.For more

information, refer to section 5.0.

The remainder of this manual describes the functions and

specifications of the Remote I/OCommunications module,Remote

I/O Head, Remote Drive Interface Head, and the AutoMax Remote I/O

Shark Interface module. It also includes installation and

troubleshooting procedures, as well as configuration and

programming information.

Related Hardware and Software

Model number (M/N) 57C416 contains one Remote I/O

Communications module.

M/N 57C554 contains one AutoMax Remote I/O Shark Interface

module.

M/N 57C328 and M/N 57C330 each contain one AutoMax Remote I/O

Head.

M/N 57C329 contains one AutoMax Remote Drive Interface Head.

The Remote I/OCommunications module, the AutoMax Remote I/O

Head, the AutoMax Remote Drive Interface Head, and the AutoMax

Remote I/O Shark Interface module can be used with all versions of

the AutoMax and DCS 5000 Processor.

Remote I/O communications is supported by all versions of the

AutoMax Programming Executive software.