Wiring Diagrams - Communication
12
Operation via communication link with Local / Remote selector switch
* Remote: via Communication link
* Local: Soft-start, soft stop by maintained contact
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
N
22
23
24
25
26
27
M
UVW
L1 L2 L3
28 29 30 31 32
Start
Soft Stop
Remote
Local
L1
b
L2
b
L3
b
RS485 to
RS232 Adapter
Twisted Shielded Pair
The communication enables remote parameter settings and
reading. For start, stop, soft-stop, dual adjusts, etc terminals
4 and 5 must be wired as shown.
Soft-start and soft-stop
• Program the “Serial Link Number” in the communication page to a number between 1-247.
• Disconnect control supply, so the new information will be loaded on the next time you turn it on.
• Connect a communication line (twisted shielded pair) with its (+) to RVS-DN terminal 24 and (-) to terminal
23, connect the other end to your computer containing RS-485 communication port with MODBUS protocol.
• Connect other RVS-DN terminals as follows:
1. Terminal 1, 3 and Control Supply.
2. Terminal 4 to Control Supply phase.
3. Terminal 9 to Neutral (or the Common for terminals 4,5,6).
4. During operation via communication link, terminal 5 is connected through the “Local-Remote”
selector switch to Control Supply and Start-Stop commands are controlled through the communication
port.
During operation in Local mode, terminals 5 and 6 are connected to Control Supply through the
Start/Stop toggle switch.
5. Terminal 21 should be at ground potential.
WARNING
The host computer must be grounded when communicating with RVS-DN (unless using a Lap-Top Computer).