Modbus functions158 FP Web-Server V2.810 ENFunction CommentAModbus-TCP server(see p. 158)A1 Modbus-TCPserverModbus-TCP client FP Web-Server PLC (see note 2)A2 Modbus-TCPserverModbus-TCP client FP Web-Server multiple PLCs (see note 1 and note 2)A3 Modbus-TCPserver gatewayModbus-TCP client FP Web-Server Modbus RTU slave (see note 1)BModbus-TCP client(see p. 160)B1 Modbus-TCPclientPLC FP Web-Server Modbus-TCPserverB3 Modbus-TCPclient gatewayModbus RTU master (see note 1) FPWeb-Server Modbus-TCP serverB5 Modbus-TCPclient for data_loggerFP Web-Server internal control fromData logger (see p. 61) and FPWEBScript (see p. 73)In addition: ModbusRTU functions (forPLCs that do notsupport Modbus RTUprotocol)B2 Modbus RTUmasterPLC FP Web-Server Modbus RTUslave (see note 1)B4 Modbus RTUslaveModbus RTU master (see note 1) FPWeb-Server PLCFor an overview on all functions, please refer to the block diagram (see p.14). This function uses the 2nd RS232C (9-pin Sub-D connector). Since Modbus protocol, in contrast to the PLC, only recognizes 4different memory areas, a configurable address translation tablewas implemented. This allows you to configure offsets so thatModbus "coils" and "registers" correspond to the PLC's memoryareas: X, Y, R, DT, FL, WR, etc. Various functions can be combined and used simultaneously. Most functions support the same list of Modbus function codes. You can configure all these functions manually or with the help ofthe wizard.17.2 Modbus-TCP server of the FP Web-Server in generalThe FP Web-Server can be accessed by a Modbus-TCP client (SCADA) viaEthernet for PLC data communication. To do so, the FP Web-Serverrequests PLC data (MEWTOCOL protocol) via the 3-pin or/and 9-pinRS232C port or the serial ports (RS485, USB) of the FP Web expansionN o t e
