340 Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
Appendix G Connect to Networks using DF1
Configure a Standard-Mode
DF1 Half-Duplex Master
Station
Choose standard mode if you want to query slave stations for information based upon user-
configured polling ranges. This mode is used most often in general point-to-multipoint
configurations.
To configure the controller as a master station using standard- communication, place the
controller into program mode and follow the steps below using your programming software:
The following table shows the parameters for configuring a Micro850 (2080-L50E) or Micro870
(2080-L70E) controller as a master station using standard-communication mode to talk to
slave stations.
ATTENTION: For almost all modem applications, the RTS Off Delay should be
left at 0. Never select an RTS Off Delay that is greater than the RTS Send Delay
in the other devices on the network, or you may incur two devices trying to
transmit simultaneously.
Table 92 - Configure a Micro800 Controller as a Master Using Standard-communication
Mode
Parameter Selections
Baud Rate
Select a communication rate that all devices in your system support. Configure all
devices in the system for the same communication rate.
Parity
Parity provides additional message packet error detection. To implement even
parity checking, choose Even. To implement no parity checking, choose None.
Node Address
A node address identifies the controller on the DF1 half-duplex link. Each station
on a link must have a unique address. Choose an address between 0
10
and 254
10.
Node address 255
10
is the broadcast address, and cannot be selected as a
station’s individual address.
1. To bring up the configuration page, click
Serial Port.
2. On the Serial Port configuration page, select
Half-Duplex Master for DF1 Mode.
3. Choose a Standard Polling Mode.
4. Configure the rest of the communication
driver according to Table 92
.
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