BASEstar^tm Open DAS
for Allen-Bradley Data Highway^tm
on Tru64^tm UNIX
Installation and User's Guide

Figure 3-34 shows the structure of a legal Block-Transfer Read/Write Control data table address for the PLC-5/250. Figure 3-35 shows a PLC-5/250 Block-Transfer Read/Write Control structure.

Table 3-22 shows examples of legal Block-Transfer Read/Write Control data table addresses for the PLC-5/250.

Figure 3-34 PLC-5 / 250 Block-Transfer Read / Write Control Address Format

Figure 3-35 PLC-5 / 250 Block-Transfer Read / Write Control Structure

Table 3-22 Example PLC-5 / 250 Block-Transfer Read / Write Control Addresses

Example Address	MMS Type1	Description
BR01:1.DLEN	UNSIGNED_16	I/O rack 0, group 1, remote scanner 1, slot 1 done length.
BW16:0.PLEN	INTEGER_16	I/O rack 1, group 6, remote scanner 1, slot 1 programmed length.
BR103:1.EN	BIT_STRING 2	IO rack 10, group 3, remote scanner 2, slot 1 enable bit.
$BW27:1	Structure 3 UNSIGNED_16 UNSIGNED_16 UNSIGNED_16 UNSIGNED_16 UNSIGNED_16 UNSIGNED_16 UNSIGNED_16 UNSIGNED_16	All of Block-Transfer Write Control for I/O rack 2, group 7, remote scanner 1, slot 1. Error code/status bits. Done/programmed length. Time stamp. Current/programmed time-out. File number/file offset. Reserved. BT directory offset. BT directory length.