Emerson Vission 20/20 Operation And Service Manual page 203

Appendix B • Vission 20/20 Application Procedures
power is restored, which means it will not accept any
"writes" via communication, within the Compressor
Command register region, until someone walks up
to the panel and presses Unit Start-> Remote.
2. Never
• The compressor will not restart after power is
restored. The Remote Lock will be ON after power
is restored, which means it will not accept any
"writes" via communication, within the Compressor
Command register region, until someone walks up
to the panel and presses Unit Start-> Remote.
3. Timed
• The compressor WILL attempt a restart after power
is restored and the Max Restart After Power Failure
timer has timed out. The Remote Lock will be ON
after power is restored, which means it will not
accept any "writes" via communication, within the
Compressor Command register region, until some-
one walks up to the panel and presses Unit Start->
Remote.
4. Remote Lock Off
• The Vission 20/20 panel will boot up with the
Remote Lock OFF which will allow the panel to
accept all remote control commands, via commu-
nication, immediately after power is restored to the
panel.
5. Boot in Remote (Direct I/O)
• The Vission 20/20 panel will boot up with the
Remote Lock OFF and be placed into REMOTE mode,
which will allow the panel to accept Direct I/O com-
mands immediately after power is restored to the
panel.
REMOTE MONITORING
• It should be noted that while the compressor is
being controlled (starting, stopping and capacity
control) via hard-wired inputs, monitoring of com-
pressor operating parameters can still occur by using
the communication ports available in the 20/20.
Remote monitoring can be accomplished by utiliz-
ing either the Ethernet communication port (via
Ethernet I/P or Modbus TCP/IP) or the serial port (via
RS485 Modbus RTU). For communication register
information, refer to Table B4.
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
COMMUNICATION PORT SETUP
(Reference the "Communication" section of Figure B-24)
For Serial Port Modbus RTU Monitoring:
• Check the
"Communications" section.
• Confi gure serial port settings (baud rate, # data
bits, # stop bits, parity) and panel ID number
(which is "node" number for Modbus RTU.)
For Ethernet Monitoring:
• Check the "Ethernet"
"Communications" section.
• Confi gure IP address and Subnet Mask.
• Select Protocol (Ethernet I/P or Modbus TCP/IP)
Once the port is setup properly, communication can be
established. You will be able to read from and write to
registers. In Direct I/O mode, you cannot write to reg-
isters in the Control Block region of Modbus registers
40500 through 40513.
"Serial" box inside
box inside
the
the
B - 47