Re: Delta Tau issue

["Lazarski, Krzysztof Z. via Tech-talk" <tech-talk at aps.anl.gov>]

Hi Mark,

We are not using GeoBricks, but Turbo PMAC Ultralites with fiber MACRO, but as I remember in the case of global status bits, their meanning could depend on the firmware version, for example:

V1.947 Updates (May 2010)

1. Geo Brick version “A” firmware only: Set “configuration error” global status bit if do not receive

proper response to AMPVER command, preventing subsequent operation. (This means that Geo

Brick LV and Brick Controller cannot use Geo Brick “A” firmware.)

I took it from the Turbo PMAC/PMAC2 Software Reference Manual.

The changes in the firmware are described at the end of these manuals.

All the best ,

Krzysztof

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
Sent: Monday, July 25, 2022 3:25 PM
To: tech-talk <tech-talk at aps.anl.gov>
Subject: Delta Tau issue

 

Folks,

 

I have a Delta Tau GeoBrick 8-channel system.  I have been using it with the Model 2 driver (not based on asynMotorDriver) in the tpmac repository: https://github.com/epics-modules/tpmacc.  I had not seen any errors with that driver.

 

I have just updated it to use the Model 3 driver (based on asynMotorDriver) in the pmac repository: https://github.com/dls-controls/pmac

 

The motors seem to be driving OK.  However, the OPI screens show a Controller Error, and the poller prints this message:

 

2022/07/25 15:10:09.937 pmacController::fastUpdate *** Hardware Problem *** global status [???] => 8400913

 

The controller error is generated if this _expression_ is non-zero:

const epicsUInt32 pmacController::PMAC_HARDWARE_PROB = (PMAC_GSTATUS_REALTIME_INTR |

                                                        PMAC_GSTATUS_FLASH_ERROR |

                                                        PMAC_GSTATUS_DPRAM_ERROR |

                                                        PMAC_GSTATUS_CKSUM_ERROR |

                                                        PMAC_GSTATUS_WATCHDOG |

                                                        PMAC_GSTATUS_SERVO_ERROR);

 

 

That Global Status value 8400913 in hex is 0x803011.  This translates to the following status bits being set:

 

Bit	Symbolic constant	Problem bit in PMAC_HARDWARE_PROB?
0x1	PMAC_GSTATUS_CARD_ADDR	No
0x10	PMAC_GSTATUS_MACRO_RING_ERRORCHECK	No
0x1000	PMAC_GSTATUS_CKSUM_ACTIVE	No
0x2000	PMAC_GSTATUS_CKSUM_ERROR	Yes
0x800000	PMAC_GSTATUS_RESERVED3	No

 

So it appears that the Controller Error on the OPI screen and the error message being printed is because the PMAC_GSTATUS_CKSUM_ERROR bit is set.

 

Does anyone know what that bit means, and why it might be set?

 

Thanks,

Mark