Yes, the OITs connect together in a daisychain fashion. One of the OITs is designated as the ‘master’ while the other OITs are defined as ‘slaves’. The master OIT is directly connected to the PLC communications port. Each slave OIT then communicates through the master OIT to get data from the PLC. No additional communications…
You can use the Data Transfer object in EBPro to move data from a block of registers in one area of memory and write the data to a block of registers in another area of memory in the Maple Systems HMI. This can also be accomplished with a macro using the GetData() and SetData() instructions.
A virtual private network (VPN) extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. It allows you to access devices on a remote network as though you were on the same…
After adding a new recipient to your project in EBPro, make sure the “Use existing contact settings on HMI first (if existed)” option is NOT selected in the System Parameters e-Mail tab. If it is selected, then the updates to the recipient list will not be downloaded to the HMI.
Refer to Tech Note 5077, “IP Addresses of an HMI and a PLC” on how to set the IP address of the Maple Systems HMI, set the IP address of the PC, change the setting on the Internet Protocol dialog box, and setup and configuration settings. Note that configuring IP addresses while connected to an…
There is no limit on the number of Time-based (Global) Data Transfers you can have in a project. However, the more you have, the more overhead it requires of the CPU, which can affect the performance of the HMI.
Some benefits of implementing a Wi-Fi network in your factory include: Costs by Creating a Wireless Network: Wi-Fi can solve applications where wiring is impractical or too expensive. There’s no need to run expensive Ethernet or Serial cables throughout your plant. Add a Wi-Fi router to your network and you’re ready to go. Flexibility in…
EasyAccess 2.0 uses TCP Port 443.
The Maple Systems Operator Interface Terminal’s (OITs) message passing protocol allows the PLC programmer to choose between two different levels of implementation. The first is a simple, no-handshaking message protocol intended for simpler operator interface applications; the second level adds full message handshaking between the OIT and the PLC. Tech Note 1024, Message Protocol for…
Many PLCs have actual, physical memory locations that can be referenced. Not so with Allen-Bradley CompactLogix and ControlLogix PLCs. They use symbolic Tags, which means the tag file needs to be imported into EBPro in order to reference any PLC address / variable. Define the PLC by going to the System Parameters Device tab. Click…
Virtual Network Computing (VNC) is a graphical desktop sharing system that uses the Remote Frame Buffer protocol (RFB) to remotely control another computer. It transmits the keyboard and mouse events from one computer to another, relaying the graphical screen updates back in the other direction, over a network.
Most of our HMIs come with a built-in VNC (Virtual Network Computing) server. VNC is a Remote Frame Buffer protocol used for remote operation and screen sharing. It enables you to instantly monitor and control a remote HMI as though you were standing in front of it. When enabled, any third party VNC viewer client…