Yokogawa YFGW410 User Manual download pdf (Page 24)

<B2. YFGW410 Function Outline>

B2-1

IM 01W02D01-01EN

B2. YFGW410 Function Outline

The following outlines the YFGW410 functions.

YFGW410 has the System Manager, Security Manager, and Gateway functions. Also, this device

has the switching hub functions to connect the host system, PC to operate Field Wireless Man-

agement Console and other applications.

B2.1 System Manager

The System Manager controls the wireless communication of eld wireless devices, congures

the eld wireless backbone devices, and provides the database function.

The management function of the eld wireless device establishes a communication path to each

eld wireless device, monitors the Join or Leave status of each eld wireless device, and noties

the Field Wireless Management Console with an abnormality. Also, this function determines the

communication availability in conjunction with the Security Manager.

The management function of the eld wireless backbone device is used to initialize the IP ad-

dress, network address and others of the YFGW410 and YFGW510.

The database function of the eld wireless network is used to manage the network informa-

tion data contained in the YFGW410 and to control the data synchronization during redundant

YFGW410 system conguration.

B2.2 Security Manager

The Security Manager has the functions for eld wireless device authentication and for encryp-

tion key management.

The Security Manager allows eld wireless devices to join to the network with the Join key, Ses-

sion key and others. This manager is used to create, update, and delete an authentication/en-

cryption key during communication.

B2.3 Gateway

The YFGW410 bridges between the eld wireless network and the host system.

During Modbus communication, the eld wireless device data is transmitted to the host system.

The Read Input Register, Read Holding Register, and Write Holding Register functions are sup-

ported. Before transmitting data to the host system, it is necessary to map the transmission proc-

ess value, device status, alert information and other data to registers.

In the ISA100.11a protocol communication, the information about eld wireless network state and

device state of this network is transmitted when requested by the host system. Also, the gateway

relays a request and its response between the host system and eld wireless devices.

The Gateway can cache the diagnosis data acquired through communication with the eld wire-

less device in the YFGW410’s internal memory. The efcient communication to wireless eld

devices can use a wireless band exibly and improve the response to the host system.

IMPORTANT

When access to the Modbus registers that are not mapped in YFGW410, a non-zero data may

be contained.

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Yokogawa YFGW410 User Manual Page 24