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…
Yes, several Maple Systems HMIs can be connected to one PLC. The HMIs can also directly share data. You will need to set up a local and a remote HMI in the Systems Parameters and depending on if you are setting up 2 Advanced HMIs, or using an Advanced and a cMT HMI, the steps…
If communications between the HMI and PLC are interrupted, a “PLC No Response” error message will appear on the HMI. Possible reasons for this message could be that the communication cable may be wired incorrectly, the protocol settings in System Parameters do not match the PLC communications parameters, or the HMI is referencing a PLC…
The Free Protocol driver along with Macro commands can be used to send and receive ASCII data on an HMI. The OUTPORT macro function is used to send an ASCII string out of your HMI’s serial port, and the INPORT macro function allows you to receive an ASCII string to your HMI. Examples of both…
Control systems often require operator input from a number of different locations in the system. Since it is not cost effective to run a separate communications line from the host to each terminal location, a local network is desirable when multiple terminals are needed. Tech Note 5030, “Networking HMIs with RS-485” explains how this can…