Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 81)

Chapter
7
Parallel Port Communications
This chapter describes Run mode operations for the Parallel port
versions of the DL40 Plus.
Section Page
Types of Run Modes 7–1
Describing the Parallel Port 7–3
Selecting Binary or BCD Data Format 7–4
Logic Voltage Levels 7–6
Message/Variable/Slave/ Run Modes 7–7
Message List Run Mode 7–10
Sampling 7–12
Run mode is the normal operating mode for the DL40 Plus. In Run
mode, messages are triggered to display on the DL40 Plus and
optionally on slave message displays.
The Parallel port version of the DL40 Plus enters Run mode after a
reset except when the Run Mode/Debug DIP switch is set to Debug.
When using the Parallel port for communications, two Run modes
are available:
•
Message/Variable/Slave triggers a message with 0 to 40
variables depending on the trigger method and the variable type.
You can send messages to slave displays specified as a message
attribute or optionally override the slave address attribute for each
trigger occurrence.
•
Message List triggers a message list with a maximum of 20
messages in round robin order. Permits slave message displays
specified as a message attribute.
You can select the type of run mode you want using the Onboard
Editor or Offline Programming Software. The table on the next page
provides an overview of the differences between the two Run modes.
Chapter Objectives
Types of Run Modes