B&R Industries X20 System, User Manual

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X20 system modules • X20 electronics module communication • X20CS1011
1472 X20 system User's Manual 3.10
4.18.2.8.12.2 Starting the bus after slave error
Status information after slave error
In this case, a change to MasterOperatingState and MasterStatus cannot be detected at first, although the respec-
tive error bits are set in the SlaveStatus. The slaves have failed, and data is no longer being exchanged.
Value (decimal) Register Information
20 MasterOperatingState
345 MasterStatus
x SlaveStatus Bits for the faulty slaves have been set
To set the master to a defined state, the bus must first be stopped with the following write commands.
Value (decimal) Register Information
0 SmartWireMode All off
0 SmartWireEnable All off
Wait until the commands have been completed successfully, which is indicated in the MasterStatus. Bit 4 is cleared:
Response indicating that the bus is no longer operational.
Value (decimal) Register Information
20 MasterOperatingState
329 MasterStatus
0 SlaveStatus
The bus can be restarted using the write commands after the errors have been corrected:
Value (decimal) Register Information
1 SmartWireMode Configuration from rem. memory
3 SmartWireEnable Command for STACK ON / OPERATIONAL
Status information after error-free startup of the bus:
Value (decimal) Register Information
20 MasterOperatingState "RUN without error if SlaveStatus = 0"
345 MasterStatus "RUN without error if SlaveStatus = 0"
0 SlaveStatus No slave errors
Different status information can result depending on the present error situation (see 4.18.2.8.5 "MasterOperatingS-
tate").
Typical situation when there are hardware configuration differences:
Value (decimal) Register Information
0 MasterOperatingState
80 MasterStatus
0 SlaveStatus
Information:
A stop command must be sent before a new start command can be applied!