Rockwell Automation 2706-ND1 DL40 OFFLINE PROGRAMMING SFTWR.USER MANUAL User Manual
Page 21
Chapter 2
Introduction to the DL40
2 – 10
Table 2.C
Summary of Remote I/O Run Mode Types
Feature
Message/Variable/Slave
Run Mode
Message/Variable Run
Mode
Message List Run Mode
Bit Trigger Run Mode
Trigger messages
Trigger a message with 1 to 40 variables, depending on rack
size, trigger method, and variable type
Triggers a message list of
up to 20 messages in
Round Robin Order
Triggers a Priority Message
and up to 496 messages in
Priority and/or Round Robin
Order
Triggering method
D
1
/
4
rack – Block Transfer
only
D
1
/
2
,
3
/
4
, full rack – Discrete
I/O or Block Transfer
D Keyboard
D RS-485 link
D Discrete I/O or Block Transfer
D Keyboard Port
D RS-485 link
D Discrete I/O or Block
Transfer
D Keyboard (for Priority
Message only)
D RS-485 link (for Priority
Message only)
Send messages to slave
display
Slave address for each
message can be specified
with message trigger.
(Overrides address
specified as Message
Attribute)
Slave address specified as a Message Attribute
Send variables to place in
message
D Up to 10 (16 bit) binary or (4 digit) BCD
D Up to 20 (8 bit) ASCII
D Up to 40 (4 bit) BCD
No
Variable types
Binary – Signed and Unsigned BCD
ASCII
Not Applicable
Handshaking
Yes
Diagnostic code sent to PLC
Yes
Message acknowledgement
Yes
Input and display of ASCII
input data (via keyboard
port)
Up to 20 ASCII characters
Return ASCII input data to
PLC via Remote I/O port
D Discrete I/O – Up to 12 characters, depending on rack size
D Block Transfer – Up to 20 characters, independent of rack size
No
Return ASCII input data via
RS-485 port
Up to 20 characters, independent of rack size
Put message on Historical
Events Stack
Yes