User's Manual

PAC Configuration Manual
Wireless Matrix Corporation #102, 1530 - 27 Avenue NE Page 35 of 62
Document # xxx-xxx-xxx Calgary, AB, Canada T2E 7S6
2002.02.01 Ph. 403.250.3949 Fax [phone] www.wrx-ca.com
5.3 Allen Bradley DF1 Driver
RTU Driver : Allen Bradley DF1 Driver V2.1
KeyCode :DF1
This driver will interface to a PLC that supports the Allen Bradley DF1 Protocol. The PAC
implements a subset of the commands transported via DF1 so support is restricted to PLCs
which use the “Protected Typed Logical Read/Write” commands.
The list of PLCs, tested and verified, follows:
- SLC 500 Series
- Micrologix 1500
The DF1 protocol driver has the following settings:
RTU
TYpe DF1 – Set the RTU driver to DF1 protocol.
DEbug <off | on>
ADDress <1> – The master address. Default is 1.
DUPlex <full | half> – The default is full duplex mode.
CHKsum <CRC | BCC> – The method of error checking. The default is CRC.
MAXRetries <2> – The default is 2.
RXTimeout <1> – The default is 1.
COMM
POrt <COM1 | COM2 | COM4> – The RTU driver must use COM2
(RS232) or COM4 (RS485). COM1 is the network port for the TPAC.
BAud <1200 | 2400 | 4800 | 9600 | 14400 | 19200 | 28800 | 38400>
DAtabits <7 | 8>
PArity <None | Even | Odd>
STopbits <1 | 2>
DF1 Driver I/O Configuration
IO Point Configuration:
The DF1 protocol uses a single byte (0-255) to address a particular device on a DF1 network.
The DF1 protocol has two modes, full duplex and half duplex. The mode depends on the
PLC network configuration. In half duplex mode, many PLCs may be present on the
network and each must be properly addressed to elicit the correct response. In full duplex
mode, only one PLC is connected and the address is irrelevant. However, when the address
does not match the PLC station number, there are occasional pauses in the response from the
PLC. Wireless Matrix recommends that the address always match the PLC station address.
I/O Addressing:
Almost all data within the PLC is addressable. The DF1 driver implements a standard
address scheme to access all data. The scheme is based upon the specifications for the
SLC500 series and Micrologix 1000 series. The following is the address format.