Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 140)

Chapter 12
DIP Switch Settings
12 – 5
Notes on Switch Settings
Fast Reset Sequence (Switch #3)
If the Fast Reset DIP switch is set to ON, the DL40 will display only the
Firmware Version, Screen Test, and the Selected Run Mode. All other
prompts will be skipped (but the tests will still be run). If any of the tests fail,
then that error message will still appear. If the Fast Reset DIP switch is set to
OFF, the DL40 will display the Firmware Version, Memory Verification,
External Module Verification, Screen Test, RS-232 Port Settings, RS-485
Port Settings, Remote I/O Settings, and the Selected Run Mode.
Block Transfer Enabled (Switch #4)
If the Block Transfer Enabled DIP switch is set to ON, then block transfer
files are used for communication with the PLC. If the Block Transfer
Enabled DIP switch is set to OFF, then Discrete I/O is used to communicate
with the PLC.
Last Chassis (Switch #5)
The Last Chassis setting tells the PLC if the DL40 is the last device of that
logical rack, not necessarily the last rack of the remote I/O link.
Keyboard Type (Switch #6)
If the Keyboard Type DIP switch is set to ON, then an IBM-XT or
compatible is the only type of keyboard that can be used. If the DIP switch is
set to OFF, then the IBM-AT or compatible is the only type of keyboard that
can be used.
Handshake Enable (Switch #7)
•
With Block Transfer Enable Switch OFF. If the Handshake Enabled
DIP switch is set to ON this allows the use of the handshake bit. NOTE:
If HANDSHAKE (switch #7) is enabled, the HANDSHAKE rung must
be programmed in the ladder logic. See page 10 – 28.
•
With Block Transfer Enable Switch ON.
– Handshake Switch ON – DL40 will indicate ERROR if no block
transfer reads are requested for one minute.
– Handshake Switch OFF – DL40 will not generate error message if no
block transfer reads are requested. Messages will continue to run.
Last State (Switch #8)
If the Last State DIP switch is set to ON, then the DL40 will have the
following behavior in the event that communication is lost.
If communication is lost when LAST STATE is enabled, the DL40 will
alternate the error message with the current display. The DL40 will still run
messages triggered via the keyboard or the RS-485 port.