Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 28)

Chapter 3
The Run Mode – Remote I/O
3 – 2
Table 3.A
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
In the Message/Variable/Slave Run Mode you can:
Trigger Messages Via a PLC Using the Remote I/O Port
You can trigger a single message by either discrete I/O or a Block Transfer
Write. See Chapter 10 for more information.
Message/Variable/Slave
Run Mode