Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 314)

Publication AG-UM008C-EN-P - February 2005
9-8 Configuring RSLinx Classic Software for DF1 Half-Duplex Communications
Figure 9.7 Transmitting Strategies
Table 9.7 Transmitting Strategies Parameter Descriptions
Control Control Text
Allow; Master retransmits
msg to final destination Allows slave to slave communications. This is the default setting.
Send reply to originator on
transmission errors When enabled, if the driver fails to forward a command packet (a reply is expected) to another target
device, RSLinx Classic generates a reply packet with a status code of 2 (station not on link). The default is
checked.
Disallow; ACK the slave and
ignore The message from the slave is discarded with no indication given to the slave. This slave is responsible for
timing out the packet and taking any required action.
Disallow; ACK the slave and
generate error reply to slave The message from the slave is discarded and a reply packet to the slave is generated with a status code of
hex 10 (illegal command was received by the target station).
Between Station Polls The master waits until any current polling cycles are complete before transmitting any packets that have
buffered. This mode is not recommended when each station has its own dial-up modem configuration. This
is default setting.
In Poll Sequence The master can not transmit any messages buffered until its turn in the polling list is reached. The master
station address must appear in either the normal or priority poll lists.
By Poll Lists The master polls each slave in turn according to the polling lists, but only transmits to the slave which is
the current station being polled.
Xmits for Master When the master has something to transmit, if this is set to a non-zero value, the master ceases
transmitting when that quantity of messages is reached and conducts another polling operation. If this is
set to zero, the master transmits as many messages as it has buffered.
Default Xmits for each Slave This limits the maximum number of times the master polls a slave before moving on to another slave to be
polled.
Assign quantities separately
for each station The maximum number of polling packets the master sends to the slave may be regulated separately for
each slave. Select to display all stations, or either Priority or Normal stations.
Station # Select the station number to display.
Qty Enter the number of packets to display.
Accept Click this to accept the quantity entered for the station number.
Defaults Resets the default values for each control on the dialog box.