Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 37)

Chapter 4
The Run Mode – Parallel Port
4 – 2
Table 4.A
Summary of Parallel Port Run Mode Types
Feature
Message/Variable/Slave Run
Mode
Message List Run Mode
Trigger messages Trigger a message with 1 to 40
variables, depending on trigger
method and and variable type Triggers a message list of up to 20
messages in Round Robin Order
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
Message acknowledgement Yes
Input and display of ASCII input
data (via keyboard port) Up to 20 ASCII characters
Return ASCII input data via
RS-485 port Up to 20 characters
Put message on Historical Events
Stack Yes
In the Message/Variable/Slave Run Mode you can:
Trigger Messages Via the Parallel Port
You can trigger a single message. See Chapter 9 for more information.
Trigger Messages Via the Keyboard Port or the RS-485 Port
See Chapter 9 for more information.
Send Variables to be Included In Message
Your PLC can include variables with the message trigger. Up to the
equivalent of 10 full word variables can be sent with the message trigger.
Variable types include:
•
16 bit binary (1 variable per word)
•
8 bit ASCII (2 per word)
•
4 digit signed Binary Coded Decimal (BCD) (1 per word)
•
1 digit (4 bit) unsigned BCD (4 per word)
Message/Variable/Slave
Run Mode