Yokogawa YFGW410 - Manual (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 field wireless devices, configures
the field wireless backbone devices, and provides the database function.
The management function of the field wireless device establishes a communication path to each
field wireless device, monitors the Join or Leave status of each field wireless device, and notifies
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 field 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 field 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 configuration.
B2.2 Security Manager
The Security Manager has the functions for field wireless device authentication and for encryp-
tion key management.
The Security Manager allows field 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 field wireless network and the host system.
During Modbus communication, the field 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 field 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 field wireless devices.
The Gateway can cache the diagnosis data acquired through communication with the field wire-
less device in the YFGW410’s internal memory. The efficient communication to wireless field
devices can use a wireless band flexibly 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.