44
3.9.5 BAUD RATE
Purpose: Defines the data rate at which communications occur.
Setting:
AUTO or 9600 or 4800 or 2400 or 1200 or 600 or 300
Procedure: Select the data rate to be compatible with other devices that will be connected to the
controller for communications purposes.
Note: Not all communications interfaces support the various data rates, so the data rate should
be set to
AUTO. The controller will automatically select a BAUD RATE that is compatible with the
communications interface installed. If
BAUD RATE = AUTO and a MODEM communication interface
is used, a data rate of 300 is selected. Otherwise, if
BAUD RATE = AUTO and a non-MODEM com-
munications interface is used, a data rate of 9600 is used.
3.9.6 PARITY (MODBUS™) (V3.11 AND UP)
Purpose: Defines the type of parity bit used with
MODBUS™ communications.
Setting:
NONE or ODD or EVEN
Procedure: Select the desired type of parity. Note that PARITY can only be selected when using
either
MODBUS™ protocol.
3.9.7 HARDWARE
Purpose: Identifies the type of communications interface installed in the 920 control module.
The controller automatically determines and displays which communications interface type is
available.
Values:
NONE, MODEM or RS-232 or RS-485
3.9.8 DRIVER
Purpose: Defines the way the controller’s program communicates with the communications
interface.
Setting:
AUTO or RS-232 or RS-485 or MODEM
Procedure: Select AUTO to enable the controller to choose the setting that matches the commu-
nications interface installed.
3.9.9 PROFILE
Purpose: Defines the way the controller’s program supports communications handshaking and
communication interface signals.
Setting:
AUTO or
FLOW CONTROL RS-232 or
STANDARD RS-232 or
3-WIRE RS-232 or
RS-485 or
EXTERNAL MODEM or
1200 BAUD MODEM or
300 BAUD MODEM
Procedure: Select the PROFILE to be compatible with other devices connected to the controller
for communications purposes. The setting should be
AUTO. The controller will automatically
select a profile based on the type of communications interface installed in the 920 control mod-
ule.
Notes:
•
AUTO: Selects a communications profile based on the data rate and the type of communica-
tions interface installed in the control module.
•
FLOW CONTROL RS-232: Continuously asserts RTS (Request To Send), CTS (Clear To Send) is
required to enable any data transmitted, uses
DCD (Data Carrier Detect) to qualify receive
data.
To Next Page
Loading...
