Control Microsystems SCADAPack 350 Hardware Manual page 40

Parameter
Data Bits
Stop Bits
Receive Flow Control
Transmit Flow Control
Station
Protocol
Addressing Mode
COM2 transmits and receives differential voltages to other RS-485 devices on a network. The RS-
485 specification allows a maximum of 32 devices connected on a single RS-485 network. The
specification for RS-485 recommends that the cable length should not exceed a maximum of 4000
feet or 1200 meters.
The signal grounds of the RS-485 devices in the network are not connected together but instead are
referenced to their respective incoming electrical grounds. The grounds of the RS-485 devices on the
network must be within several volts of each other. Controller ground is connected to the chassis.
SCADAPack 350 Hardware Manual
February 14, 2007
Supported Values
7 or 8 Bits
Default: 8 Bits
1 Bit
Default: 1 Bit
None or Xon/Xoff
Default: None
None or Xon/Xoff
Default: None
1 to 65534
Default: 1
None, Modbus RTU or Modbus ASCII, DF1 or DNP.
Default: Modbus RTU
Standard or Extended
Default: Standard
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