BASEstartm Open DAS
for Allen-Bradley Data Highwaytm
on OpenVMStm
Installation and User's Guide
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Figure 3-36 shows the structure of a legal Adapter Status data table address for the PLC-5/250. Figure 3-37 shows a PLC-5/250 Adapter Status structure.

Table 3-23 shows examples of legal Adapter Status data table addresses for the PLC-5/250.

Figure 3-36 PLC-5 / 250 Adapter Status Address Format

Figure 3-37 PLC-5 / 250 Adapter Status Structure

Table 3-23 Example PLC-5 / 250 Adapter Status Addresses
Example Address MMS Type1 Description
AS01:1.RC UNSIGNED_16 I/O rack 1, group 1, remote scanner 1 retry count
AS10:0.OI BIT_STRING 2 I/O rack 10, group 0, remote scanner 1 output inhibit
$AS27:1 Structure 3

UNSIGNED_16
UNSIGNED_16 		All of adapter status for I/O rack 27
group 1, remote scanner 3
Control bits
Retry count

1Arrays are not supported for structures other than ASCII strings.
2Control bits should be treated as read only and modified only under PLC program control. Modifying these bits from a computer can give unpredictable results.
3Write operations are not allowed to Adapter Status structures.

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