![]() ![]() ![]() Because some Modbus devices cannot handle the default of requesting 125 Input Registers in one request, to accommodate this limitation you can change this setting. Is the the maximum number of Input Registers the device can handle. Because some Modbus devices cannot handle the default of requesting 125 Holding Registers in one request, to accommodate this limitation you can change this setting. Is the the maximum number of Holding Registers the device can handle. To see and browse the Tags, you need to create the Tags as described in the Modbus Addressing section. Unlike other PLCs, Modbus devices do not support browsing, therefore you can not browse the Tags by going to the OPC Connections > Quick Client in the Configure sectio n of the Gateway. The Status will show as Disconnected and then Connected. The Devices page is displayed showing the Modbus device is successfully created and added to Ignition. You can check the box for Show advanced properties? to see the additional settings, or you can keep all the defaults.On the New Device page, leave all the default values and type in the following fields: Name: Modbus Hostname: type the IP address, for example 10.20.8.117.In this example we'll select Modbus TCP, and click Next.Modbus RTU (only available if the Serial Support Gateway module is installed) Connects to a device via Modbus RTU over serial.Which connects to devices that implement the Modbus TCP protocol. Modbus RTU over TCP Which connects to devices that implement the Modbus RTU protocol over TCP.On the Devices page, find the blue arrow and click on Create new Device. There are several options to choose from Scroll down and select OPC UA > Device Connections.Go to the Config section of the Gateway Webpage. ![]()
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