ABB SD822 3BSC610038R1 Industrial control module

Setting the message timeout bit (.TO) within the message control structure while the message is active may result in a MNRF of the controller. To avoid the MNRF, do not manipulate the message timeout bit (.TO). Instead, change the values for the unconnected timeout (.UnconnectedTimeout) and connection rate (.ConnectionRate) in the message control structure. Changing the unconnected timeout (.UnconnectedTimeout) and connection rate (.ConnectionRate) values from their defaults to smaller values causes the message instruction to error earlier and avoids the MNRF.

Serial-port control structure bit RN inaccurately cleared. 

This anomaly occurs when using firmware revision 16.020 or later. If the ACL instruction is used to clear instructions from the ASCII queue, the serial-port control structures’ RN bit is cleared (that is, the RN bit is set to zero) although it should not be. Lgx00081063 Use of revision 16 firmware and the controller serial port results in extended program scan times. If you use firmware at revision 16, including revisions 16.002…16.020, and the controller’s serial port, the program scan time may increase. The program scan-time increase in revision 16 may be 2…10 times the scan time of the same program with revision 15. This anomaly occurs only when the controller serial port is used and there is no workaround.

SSV of MotionGroup Average Scan Time

 causes a jump in scan time. If an SSV instruction with a value of zero is executed against the MotionGroup attribute TaskAverageScanTime, then a GSV instruction is executed. The average scan time jumps to an incorrect value. The larger the Coarse Update Period, the larger the jump will be. For example, with a Coarse Update Period of 26 ms, the average scan-time value can increase to over 300 ms.

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