Specifications

Table 18: Statistics Attributes
Error Condition IndicatedAttribute
The node is trying to send or receive too much at this time.Buffer Overflows
Network disruption (includes initial startup, so 1 is common)Lost Token
Problems passing the token messageRetries
Analyze Field Bus Command
The Analyze Field Bus command provides detailed information about the devices that currently reside on the local
or remote MS/TP bus. The command tells the NAE to poll each address on the FC bus, in order from 1 to 254. The
polling takes several minutes to complete. Once it finishes, the Bus Analysis Progress attribute reads Complete and
the Bus Device Configuration List displays each device on the bus.
Note: To use the Analyze Field Bus command on a Remote Field Bus, at least one of the MS/TP field controllers
must be an FEC family Metasys device.
This command attempts to show the address, make, and other attributes of each device on the bus. You can use
this information to identify devices you are unaware of and to identify third-party devices on the bus. The results of
the scan can vary depending on the device type and manufacturer of the devices on the bus.
To issue the Analyze Field Bus command:
1. Right-click the MS/TP Field Bus Integration object in the navigation tree and select Commands from the pop-up
menu. The Select Command dialog box appears.
2. Select Analyze Field Bus and click Send. The Bus Analysis Progress attribute value changes to In Progress.
3. After the Bus Analysis Progress changes to Complete, read the devices from the Bus Device Configuration
List drop-down menu (Figure 26) using Table 19.
Figure 26: Bus Device Configuration List Example
50MS/TP Communications Bus Technical Bulletin: Appendix: Maximizing and Troubleshooting the MS/TP Bus