Home Forums General Discussion Technical Questions Dover T4

Happy weekend everyone,
I was working on a T4 Saturday afternoon at the end of the day and on the IMS I was getting faults 10, 40, 52. If any one wants info on those faults let me know. I'm going back tomorrow to look at it since I didnt have much time yesterday. If any one has any thoughts let me know. Encoder on gov. And machine looked good and I'll be looking over the connections first thing tomorrow.

Thanks!

10 Software Tach Fault– The speed feedback from the position encoder exceeded the speed reference
from the CPU by more than the value set by OSP or VEE adjustment parameters.

Loss of velocity encoder or tachometer signal.

Defective velocity encoder or tachometer.

Poor tracking due to low system response.

T3 ONLY. Improper adjustment of REG tach scaling (T) pot.

T3 ONLY. Defective REG card.

This error can be artificially induced by changing s-curve adjustments during car motion. MAKE
SURE S-CURVE ADJUSTMENTS ARE CHANGED ONLY WHILE THE CAR IS STOPPED.

OSP value can be increased no more than Governor trip speed

40 CRITICAL Software Tach Fault—The car was considered out of control after a software tach fault
(Error 10). See Parameter TVI.

52 Tach Fault Warning—Measured car speed was within 10 fpm of tripping a software tach fault (Error
10). Corrective measures MUST be taken if Error 52 occurs. Trip speed can be viewed with TVI
parameter.

T4 ONLY—Improper adjustment of Position Encoder scal ing—Parameter CPF

T4 ONLY—Improper adjustment of velocity encoder scal ing—SCR drive parameter

Improper adjustment of Parameter DTD

Defective encoder (position or velocity) or tachometer
T4 ONLY—Loose governor rope at car hitch

Increase OSP parameter (SEE fault code 10)