Controller features event control overview – Delta MMC120 User Manual

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reduced. This is necessary on some computers that do not give Windows enough

time to service the serial port queue, and therefore cause serial port overruns. Most

notably this has been known to happen on some computers running Steeplechase

Software’s Visual Logic Controller. If you experience problems maintaining the

connection with the motion controller, try checking this box.

NOTE: By checking this box, the communication speed will slow by roughly 40%.

Therefore, only use this option if necessary.

Axis Names Tab

This tab contains text boxes for editing the names of the axes. Refer to

Changing the

Axis Name

for further details.

Preferences Tab

Do not show confirmation warnings check box
Select this check box to suppress confirmation-warning messages. This includes all

warnings when closing a window to save the contents to either the motion controller

or the disk. Select this check box only if you know the program very well and

understand when your work is saved.

Look-only check box
In Look-only mode, the user cannot make changes to the module. This prevents the

user from changing any parameters or issuing any commands. It is still possible to

view all data. Notice that this setting is saved away so that it will be remembered the

next time that the monitor program is started.

Controller Features

Event Control Overview

The Event Control feature allows you to execute a sequence of commands without

intervention from the Programmable Controller (P/C). This lets the module respond to

events within one millisecond rather than the scan rate of the P/C. It also reduces the

controller programming required.
Event Control consists of a series of Steps that are linked together in sequences. The

Steps consist of a command area containing the instruction to be executed and a link area

that specifies the next Step number and its trigger. There are a total of 256 Steps that can

be shared by all axes.

Steps

Each Step contains a command with its associated parameters, plus the information

necessary to link to the next Step in a sequence. The Step format is as follows: