RELAY DRIVER
32
3.2.6 MODBUS
Slave Function
Control a channel directly via the serial port using the
MODBUS
protocol. The Relay Driver communicates with a
PC or other device using MODBUS
commands over the
serial port to turn a channel ON or OFF. By writing a register
value (coil command), the output state of a channel can be
specified. More information about the MODBUS
protocol can
be found at:
http://www.modbus.org/
Relay Driver variables (channel voltages, temperature) can be
read from holding registers via MODBUS
. Channel voltages
can be read from any channel regardless of the control function
assigned. To control a channel using MODBUS
however, the
channel must be configured as MODBUS
Slave.
Common Applications
Control relays over a serial line or network
Monitor voltage signals and Relay Driver temperature remotely
over a network
For more details about using the MODBUS
protocol to
communicate with the Relay Driver, refer to the
Relay Driver
Modbus Specification
document on our website at:
http://www.morningstarcorp.com/products/
