Posted on November 7, 2016 - ( views)
Unitronics offers a wide range of PLC & HMI controllers and helps customers choosing the right devices. Selecting the manufacturer that stands behind a brand of controllers is a major decision. It is every bit as important as your CPU and I/O requirements. Here are 5 factors to consider when making that selection.
1. The PLC: Broad Range of PLCs
The selected brand must have a complete, full product range that can meet the requirements of your customers. PLCs, for example, must be able to supply sufficient memory to support I/O, log and manipulate historical data, as well as execute the control program. Where execution speed is critical, the CPU processing speed must be considered as well. Influenced by the mobile industry, customers expect HMI color touch-panels to provide the communication window between operator and system. In cases where space is at a premium, PLC + HMI all-in-one controllers have a distinct advantage. Some PLC manufacturers provide PLC + HMI controllers with onboard or snap-on I/O modules, which, in addition to saving space, also greatly reduce wiring.
2. Communications: Data Communication & More
Flexibility is key. Important industrial datacom protocols include MODBUS, CANopen and other flavors of CANbus such as CAN Layer2 and EtherNetIP. Some brands also support protocols such as SNMP and FTP. Web Server—the ability to access a PLC via web browser— and VNC support are excellent methods of remotely accessing a PLC, while SMS messaging and email are very handy for notification via mobile. You may also want to look for GPRS/GSM modem support.
3. Programming: Look for Intelligent Software
Saving time is the primary benefit of intelligently designed software. There are two particularly important factors to consider:
4. Maintenance: Service and Support
PLC manufacturers should offer a high level of customer care. Personal support –meaning from people, not automated systems, that is available 24/7 is extremely valuable. This is what can make the difference in meeting deadlines and retaining customers.Support documents, specs, and guides, should be readily available and free.
5. Cost: Total Cost of Ownership
Cost is not limited to the actual cash you pay to purchase the PLC. Development costs and future maintenance costs can make or break the profit margin. Therefore, when purchasing a PLC, remember to select the company behind the PLC.
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Available in 3.5", 4.3", and 7" screen sizes
Samba from Unitronics has been released with a new on-board I/O configuration
The V700™ has an integrated wide 7" touchscreen and was developed to answer the wide screen market trend
Compatible with all UniStream™ series Programmable Logic Controllers
The new system is supported by a recently released version of UniStream's application development software, UniLogic
the HMI 16-bit touchscreen enables data entry and display of variable data, including color Trend graphs and alarm screens
More communication capabilities with SNMP
Can be snapped onto a panel or located further away
thanks to its HMI and onboard I/Os, it fills a growing niche-OEMs on a tight budget
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