Micromod Micro-DCI: 53MC5000 PLC AND PRINTER INTERFACES - Manual (Page 37)

4.5 ALLEN-BRADLEY COMMANDS
The Allen-Bradley commands used by the PCS interface application are summarized in Table 4-1
as follows:
Table 4-1. Allen-Bradley Commands Used
Function Command
Code
Title
Read 01 Unprotected Read
Write 00
08 Protected Write
Unprotected Write
Initialization (Sets maximum
ENQS, NAKS, and timeout of
network interface.)
06 Set Variables
RS-232/485 ITB, J1 ALLEN-BRADLEY
(FEMALE DB-9 (MALE/FEMALE, DB-25/15
CABLE END) CABLE END)
RxD (IN) 2 2 TxD
TxD (OUT) 3 3 RxD
GND 5 7 GND
7 4 RTS
8 5 CTS
Figure 4-4. RS-232/485 ITB J1 to Allen-Bradley PLC Cable
Section 4. Allen-Bradley Mode
ALLEN
4-3