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E
E-2 Micro PLC Programmer’s Guide – April 1994
GFK-0804B
Overview
DISPLAY is an easy to use program that runs on an IBM PC, XT, or AT-compatible
computer. It allows monitoring of Micro PLCs using the RTU protocol. You don’t need to
know how to use RTU protocol to use the Display software. However, you do need to set
up the Micro PLC to operate using RTU protocol. Setup instructions are in chapter 7 of this
manual. If you want to learn about RTU protocol, see appendix C.
The main features of the Display software are:
Auto-polling screens that display actual data from Micro PLCs and other remote
RTU devices. The example Auto-polling screen shown below displays the contents of
four registers in a Micro PLC.
Multiple screens can be created ahead of time ( using a built-in text editor), then
displayed with a single keystroke while the system is running. The data on the
screen will be continuously updated. No programming is required, except for typing
in the display screens as you wish them to appear.
Normal operating limits can be set for any data items. “Out of range” data can be
visually flagged on the screen and optionally logged to disk for later evaluation. In the
example above, the boiler temperature has exceeded the limit in the HIGH direction.
The value and corresponding HIGH (or LOW) indication blink.
Display of system messages in an independent area on the bottom of all Auto-polling
screens. In the above example, the message “Please close the upper door” appears.
Messages with negative numbers blink. System messages are created ahead of time
and saved in a file like this:
Display of system messages is controlled by a Micro PLC on the network.