Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 95)

Remote I/O Communications 8–3
Publication 2706-6.1
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, 1 /
2
, 3 /
4
, full rack -
Discrete I/O or Block
Transfer
D RS-232
D Keyboard
D RS-485 link
D Discrete I/O or Block Transfer
D RS-232
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)
D RS-232
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/RS-232 port Up to 20 characters, independent of rack size
Put message on Historical
Events Stack Yes