Emerson Vission 20/20 Operation And Service Manual page 198

Appendix B • Vission 20/20 Application Procedures
CONFIGURATION SCREEN SETUP FOR REMOTE
CONTROL THROUGH COMMUNICATIONS
(Reference the "Communication" section of Figure B-25)
For Ethernet control:
1. Confi gure "Active Remote Control" as Ethernet.
2. At the bottom of the column, check the "Ethernet"
box.
3. Confi gure Ethernet I/P address.
4. Select Modbus TCP or Ethernet I/P protocol
For Serial Port Modbus RTU control:
1. Confi gure "Active Remote Control" as Serial
2. Check the "Serial" box inside the "Communications"
section.
3. Confi gure serial port settings (baud rate, # data
bits, # stop bits, parity) and panel ID number (which
is "node" number for Modbus RTU.)
B - 42
Figure B-25. Confi guration screen - Page 1
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Once the port is setup properly, communication can be
established. You will be able to read from and write (see
note) to registers.
In order to "write" to a register in the Control
Block region of Modbus registers 40500 through
40513, the Vission 20/20 panel must be placed
into "Remote" mode, by pressing the green "Unit
Start" button, and then pressing "Remote". The
panel will be placed into "Remote" mode, which will
allow register "writes" in this region to occur. You
can write to setpoints outside this region without
placing the panel into "Remote" mode.
INTRODUCING THE REMOTE LOCK BUTTON AND
RESTART ON POWER FAILURE SELECTION
Remote Lock
• The Remote Lock Button sets the Remote Lock
condition (ON or OFF). This determines when
communication "writes" for Compressor Command
NOTE