Wiman MAX Series · WT460M 4G + LAN Modbus gateway

How the WT460M talks to your SCADA

Four short scenes: the gateway polls your field devices, sends each reading to two servers that can be different platforms on different protocols, lets your SCADA read the devices straight through, and fails over from Ethernet to 4G without losing a reading.

WT460M working principles: field devices on an RS-485 bus, the WT460M gateway, Ethernet and 4G uplinks to a primary and a secondary server, and a local SCADA on the plant LAN Energy meter Slave ID 1 Drive (VFD) Slave ID 2 PLC Slave ID 3 Analyser Slave ID 4 RS-485 · MODBUS RTU REGISTER TABLE example values S1Voltage— S2Speed— S3Pump— S4pH— PLANT LAN · MODBUS TCP Local SCADA / HMI reads Modbus TCP Modbus TCP device TCP slave, ID 5 ETHERNET 4G LTE INTERNET Primary server polling Secondary server polling PWR GSM TXD RXD STAT WT460M Modbus master polling slave 1 SCENE 1 OF 4 Polling mode The gateway polls. Your SCADA gets the values.
Step 1 of 4

WT460M is the Modbus master. It polls each field device on the RS-485 bus, one after another, and keeps the answers in its register table.

Polled data: reads, values, events Transparent Modbus frames TLS on the server link (a padlock on the data)