Configuration 7i92m_7i76x1D

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17 Mar 2022 19:01 - 21 Mar 2022 20:06 #237554 by garrettmin
I am a Novice trying to "Get Away With" PNCConf & a 7i92 / 7i76. 

I am missing something here... 
Yes: 
Mesaflash --write 7i92_7i761xD.bit
PNCConf 7i92 Internal Data
PNCConf 7i76x2 with one 7i76
PNCConf assign Stepgens
7i92 = 5V Cable Power
7i76 = CR1 & CR2 ON

No:
PNCConf Motor Test = Motors do not turn
PNCConf 7i76-I/O TB6 = 00: Limit switch = hm2_7i92.0.7i76.0.0.input-00 = does not exist

With only this novice level of understanding,
the motors should turn? 
startup LInuxCNC & the 7i76 should be addressable for input-00 right? 
If input-00 does not exist, then the 7i76 is not seen by LinuxCNC?  Can see 7i92 but cannot see 7i76? 

Unknown Good:  7i76D CR1 & CR2 = ON / ALIVE

Burn / Smoke @ Jumper W2 while
TB1 24V Field to TB3 +5V Power Supply
7i76D Manual NOT EQUAL 7i76E:  TB3 +5V 5V Supply Power
7i76E Manual NOT EQUAL 7i76D:  TB3 UNREG LOGIC POWER+ IN

Burn / Smoke @ TB2 1-6 while
TB1 24V Field to TB3 +5V Power Supply
7i76D Manual NOT EQUAL 7i76E:  TB3 +5V 5V Supply Power
7i76E Manual NOT EQUAL 7i76D:  TB3 UNREG LOGIC POWER+ IN

Burn Smell @ Pinout = 7i76 P1 DB25 Host Connector = Matched & Reversed
P1 DB25 PInout Matched & Reversed
The DB25 Pinout was the correct "Known Good"


and then I reversed the wiring sequence #1 - #13 and it smoked.  I then reverted and it worked again.

Unknown Pinout Voltage Mismatch @ Pinout = 7i76 P1 DB25 Host Connector = Mismatched
P1 DB25 Pinout Mismatched
File Attachment:
The DB25 Cable I receipt from Ebay was the wrong pinout.  It was connected between 7i92 / 7i76 & 7i92 / 7i88.  It did not result "5V Cable Power". 

Now the entire 7i92 FPGA 7i76/7i88 may now be failed due to this "Wrong DB25 Pinout"

With all the above Folly, the 7i76 CR1 & CR2 are alive.  My goal is to get the 7i76 turning motors & switches. 
I flashed the Bit File 7i92_7i76x1D.bit, I configured 7i92 Internal Data / 7i76 with one 7i76, set the I/O for StepGens. 

LInuxCNC compiles but motors won't turn in LInuxCNC or PNCConf.... 

With only this Novice configuration, this basic 7i76 Wiring & Jumper... 
the motors should turn when I push play?  When I Test Tune Motors? 
Or is my 7i76 Burned up and I need a new one?
What am I missing here in my attempt at "A simple novice configuration?"
Last edit: 21 Mar 2022 20:06 by garrettmin.

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22 Mar 2022 14:12 #238013 by andypugh
I moved this to a new thread, rather than to the end of a 4-year old one.

Not finding the 7i76 GPIO pins is typically a sign that the field-power supply is not connected, or not turned on.

The GPIO is serially addressed and controlled by a small processor that is powered by the field power pins.

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14 Apr 2022 17:37 - 14 Apr 2022 17:48 #240245 by garrettmin
The Diagnostic concluded with "Nema 23 Encoder Cable had Wrong Pinout different than documented in Nema23 Included Instructions.

This N23 Closed Loop Stepper Motor is a StepperOnline and every Encoder Cable on every motor in fact had a different pinout than the StepperOnline Specification Sheet for the exact motor.

Diagnostic was: Remove N23 Motor End Cap @ Encoder, Test Continuity of every Encoder Wire in the Cable to 7i76. Re-Pin the N23 Encoder Pinout according to Continuity Test of individual wires.

And motors then turned....

This "Wrong Pinout" was the Problem for me that "Cloaked" the actual N23 Encoder Pinout Problem leading to other diagnostics that failed with Short Circuited Burnouts.... Had the Pinout been correct initially, everything would have started right up... Where the pinout was wrong, ultimatley I Burned up 2x 7i76 Boards as a Novice trying to figure out why my motors werent turning.

Advice for the Mesa Novice CONFIRM 100%
Print & Verify ALL Cable Pinouts with CONTINUITY TEST before connecting any Voltages to Pins.
Test LED & confirm Signals @ MESA Boards.

Fail #1
DB25 Connector shipped from Ebay with the WRONG PINOUT. WRONG DB25 led to Burnout of 7i76 & repairs of 7i92.

Fail #2
I had a N23 Motor Encoder Cable with WRONG PINOUT. Led to burnout of a 2nd 7i76.
 
Last edit: 14 Apr 2022 17:48 by garrettmin.

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