Diagnostics and Troubleshooting
PLX30 Series
User Manual
Ethernet and Serial Gateways
Page 44 of 200
ProSoft Technology, Inc.
September 19, 2012
3.3
Gateway Status Data in Upper Memory
The gateway places useful status data in dedicated upper memory locations in its
internal database. The Data Map functionality of the gateway can be used to map
this data into the normal user data range of the gateway
’s database (registers 0
through 3999), where it can be accessed by remote devices, such as HMIs or
processors. See
(page 27).
3.3.1 General Gateway Status Data in Upper Memory
The following table describes
the contents of the gateway’s general status data
area.
Register Address
Description
4000 through 4001
Program Cycle Counter
4002 through 4004
Product Code (ASCII)
4005 through 4009
Product Revision (ASCII)
4010 through 4014
Operating System Revision (ASCII)
4015 through 4019
OS Run Number (ASCII)
3.3.2 Protocol-Specific Status Data in Upper Memory
The gateway also has upper memory locations for protocol-specific status data.
Information about upper memory addresses where the gateway places status
data for its protocol drivers can be found in the Diagnostics sections of the
protocol chapters:
(page 183)
