VMX
2
Series Digital Solid State Soft Starter User Manual
55 |
P a g e
5.6.11 Serial Communications
The
VMX2 Series
starter is shipped from the factory ready to accept
RS-485 Serial Communications using Modbus RTU protocol.
F065 - F067 are used to set the communications parameters in the
starter for use by the adaptor module. F068 determines how the Start /
Stop functions work through the COM port.
F065 = Communications
Factory Setting = 0 (Disabled)
Range = 0 - 2
This enables serial communications for remote monitoring and
control systems. It also sets the format for Modbus RTU
protocol. Once Enabled, the local start / stop inputs are altered
to avoid inadvertent starting. See F068 for details.
F065 = 0
, communications are disabled.
F065 = 1
, uses the std 11-bit Modbus format w/ parity bit.
F065 = 2
, a non-standard 10-bit format without a parity bit is
used to accommodate some systems using this
method.
F066 = Baud Rate
Factory Setting = 9.6 kB
Range = 4.8 to 19.2 kB
Set value to either 4.8 kB, 9.6 kB, or 19.2 kB to match the
setting of the host device.
F067 = Modbus Address
Factory Setting = 1
Range = 1 - 247
Using Modbus communications protocol, up to 247
VMX2
Series
starters can be networked using RS485 standard
communication, each having a unique address. Two devices
with the same address will result in a communications error.
F068 = Remote Starter Control
Factory Setting = 0 (disabled)
Range = 0 - 3
This determines how the
VMX2 Series
starter is to be
controlled when using serial communications.
When F068 = 0,
the starter can be monitored by the
communications. No communications based start or stop
capabilities are available.
When F068 = 1, 2
, the starter will be controlled by the COM
port. In addition, the Start / Stop inputs are altered as follows:
The hard-
wired Start command is put in “
AND”
logic with the
COM port; Both Start commands must be on for the VMX2 to
start. The Stop function is put in “
OR”
logic; either the COM port
Stop command
OR
the hard-wired Stop will cause the VMX2 to
stop.
Special Note when using Serial Comm:
When F068 = 3, the function of the Jog Input
on TB-1 terminals 7 and 8 must be changed
to ”Remote/Local” in F113. Closing the Input
will cause the Comm. port control to function
as per setting F068=1. Leaving the input
open will cause the Comm. port to function
as per setting F068=0.
