Rj-45 Modular Connector For Ethernet - Control Microsystems SCADAPack 350 Hardware Manual

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Table Of Contents

Table of Contents

Parameter

TCP Port

Modbus Addressing Type

Modbus Station Address

Store and Forward

Messaging

The Master Idle Timeout parameter sets when connections to a slave controller are closed. Setting

this value to zero disables the timeout; the connection will be closed only when your program closes

it. Any other value sets the timeout in seconds. The connection will be closed if no messages are sent

in that time. This allows the slave device to free unused connections.

The Server Receive Timeout parameter sets when connections from a remote device are closed.

Setting this value to zero disables the timeout; the connection will be closed only when the remote

device closes it. Any other value sets the timeout in seconds. The connection will be closed if no

messages are received in that time. This allows the controller to free unused connections.

The Maximum Server Connections parameter sets the number of incoming (server) connections

that the controller will allow. Incoming (server) connections are used when a remote device creates a

connection to this controller. Outgoing connections are used when this controller creates a

connection to a remote device (e.g. using a masterip function block from a TelePACE or ISaGRAF

program). Setting this value to the maximum allows the server to use all connections for incoming

connections. Setting the value below the maximum limits the number of incoming connections from

remote devices. This reserves the remaining connections for use by the controller for outgoing

connections.

The TCP Port parameter sets the port used by the Modbus/TCP protocol. In almost all cases this

should be set to 502. This is the well-known port number for Modbus/TCP. Modbus/TCP devices

use 502 by default, and on many devices the value cannot be changed. It is suggested that you

change this value only if this port is used by another service on your network. Consult your network

administrator to obtain a port if you are not using the default.

The Addressing parameter selects standard or extended Modbus addressing. Standard addressing

allows 255 stations and is compatible with standard Modbus devices. Extended addressing allows

65534 stations, with stations 1 to 254 compatible with standard Modbus devices.

The Station parameter sets the station number of the controller. The valid range is 1 to 255 if

standard addressing is used, and 1 to 65534 if extended addressing is used.

The Store and Forward Messaging parameter controls forwarding of messages on the Ethernet

port. If this option is enabled, messages will be forwarded according to the settings in the store and

forward routing table.

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