Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 195)

Publication AG-UM008C-EN-P - February 2005
Configuring SLC 500 Processors with 1747-KE Interface Modules 5-9
Figure 5.6 Configuring the Driver for DF1 Full-Duplex
Use Worksheet 5.2 (page D-20) for an example configuration and to
record your station’s configuration.
Slave Address/Group Number When the module is configured for remote mode, enter a Group Number (octal).
Since you can have up to 254 devices on a half-duplex network and 31 devices on a DH-485 network, to
allow 255 DH-485 nodes requires using a group number. This parameter defines the address group of
the SLC 500 half-duplex address. Each address group can consist of 32 addresses.
The address of the SLC 500 processor is determined with the following formula: (32*G)+A, where G is
the group number (0 to 7) and A is the DH-485 node address of the SLC 500 processor.
One station address within each group of size 32 must be reserved for any KE module interfaces
configured with that group number. A second address within each group should also be reserved for
local DH-485 programming terminals. These 16 addresses should never have to be polled by the master
station. Finally, a remote programming terminal station address should be reserved, even if remote
programming is not considered a requirement initially. This address will need to be periodically polled,
even though it will remain on the inactive list unless there is an online remote programming terminal.
When the module is configured for local mode, enter a slave address. This parameter is the address of
the module on the half-duplex link (0 to 254).
Master Station Address The address of the master station, (0 to 254
10
).
Parameter Selections
1747-KE Module, FRN# 4
Top Level Setup Menu.
1. CONFIG PORT
2. DF1 PORT
3. DH-485 PORT
4. DF1 PROTOCOL
5. DISPLAY PARAMETERS
X. SAVE AND EXIT
Enter Selection.....
DF1 Full-Duplex Setup Menu
1. Duplicate Packet Detection
2. Checksum
3. Constant Carrier Detect
4. Modem Init String
5. Embedded Response Detect
6. ACK Timeout
7. ENQuiry Retries
8. NAK Receive Retries
X. SAVE AND EXIT
Enter Selection.....Dup Pkt Detect = Disabled, New Value (E/D) = D
Enter Selection.....Checksum = BCC, New Value (B/C) = C
Enter Selection.....CCD = Disabled, New Value (E/D) = D
Enter Selection.....Init String =
Enter Selection.....Embedded Response Detect = Embedded Response
Enter Selection.....ACK Timeout= 1, New Value (0-327.675) = 1
Enter Selection.....ENQuiry Retries = 2, New Value (0-254) = 2
Enter Selection.....NAK Received Retries= 2, New Value (0-254) =3
1. Choose DF1 Protocol.
2. Choose full duplex.
3. Configure port as
shown.
These are recommended settings;
adjust them as necessary.