Rockwell-automation 2706-ND1 DL40 OFFLINE PROGRAMMING SFTWR.USER MANUA Instrukcja Użytkownika Pobierz pdf (Strona 17)

Chapter 2

Introduction to the DL40

2–6

Historical Events Stack

With the DL40’s Historical Events Stack you can record the occurrence and

sequence of some or all of the messages or variable data values that have

been triggered and/or displayed. The 16K bytes of memory available for this

record will hold about 1,000 events. You can view this record on the DL40

itself, or obtain a printout for offline reference.

Clock Operations

The DL40 contains a real-time battery-backed clock that will keep accurate

time even when power is removed from the unit. The DL40 can display the

current time and/or date in either AM/PM or 24-hour military format.

Date and time information can be displayed as part of any triggered message,

and passed on to a PLC. You can also date- or time-stamp events as they are

recorded in the Historical Events Stack.

You can set the DL40 internal clock from the front panel menus, from a PLC,

or through the Offline Programming Software.

RS-232 and RS-485 Ports

The DL40 has both an RS-232 and RS-485 port.

The RS-232 port can be used to:

• upload or download message files from a computer

• print messages and/or Historical Event Stack contents

• upload or download message files using a data (tape) recorder

The RS-485 port can be used to:

• trigger messages with or without variable data content

• multi-drop upload or download message files from a personal computer

• send messages to slave message displays

• send ASCII data entered via keyboard or wedge to RS-485 link

Debug Mode (Parallel Port Version)

The DL40 allows you to display the binary status (1 or 0 value) of both the

strobe and data lines to check the output of a programmable controller.

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Rockwell-automation 2706-ND1 DL40 OFFLINE PROGRAMMING SFTWR.USER MANUA Instrukcja Użytkownika Strona 17