Allen bradley plc 5 slot addressing12/7/2023 ![]() ![]() ![]() These “groups” of sixteen bits (two bytes) can either be addressed directly as I or O, or they can be used a byte at a time to transfer several words of data (know as a Block Transfer or BT) to or from internal memory. Note: Groups may also be referred to as Module Groups or Words. A “Word” is defined as a group of 16 bits.) Or put another way, each of the 8 I/O Groups in a Rack contains 2 input bytes and 2 output bytes (a byte is 8 bits.) 13 from 2711e-um004_-en-p (To keep things simple, we’ll just say that a full logical Rack on Remote I/O consists of 8 I/O groups, with each group consisting of 16 input bits and 16 output bits. Therefore, you first must assign it a Rack number, Starting Group, and an overall Rack Size. With RIO, your PVe emulates a remote rack of I/O. However, when using Remote I/O it’s quite a bit trickier. Then create your Tags in the PanelBuilder 1400E software, directly addressing your PLC’s data table. Just give your enhanced PanelView a unique Data Highway Plus address, and the same baud rate as your PLC. When using PVe terminals, the most common communication options are Data Highway Plus (DHP or DH+) and Remote I/O (RIO.) So to help those who may have to troubleshoot or migrate one of these legacy systems, I’ll explain how the tag addressing works in today’s article. Using a legacy PanelView Enhanced (PVe) terminal on Remote I/O (RIO) for the first time can be challenging due to the way the tags are addressed. ![]()
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