Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 147)

Troubleshooting the FlexPak 3000 Drive 13-15
Figure 13.2 – Load SCRs Fail to Turn On
OPEN SCR SENSITIVITY (P.600)
Open SCR diagnostic
sensitivity
adjustment.
Parameter Range: 0 to 100%
Default Setting: 50%
Parameter Type: Tunable
OIM Menu Path(s): Current Minor Loop ( CML ) - SCR Diagnostics
Unbalanced AC lines can cause load sharing differences between SCR s. Increase
the value of this parameter to increase the tolerance of SCR load sharing differences
due to unbalanced lines.
OPEN SCR TRIP THRESH
(P.601)
Open SCR trip
threshold. Extremely
unusual load
conditions or severe
current loop
instability can cause
nuisance open
SCR
faults.
Parameter Range: 800 to 4000
Default Setting: 1600
Parameter Type: Tunable
OIM Menu Path(s): Current Minor Loop ( CML ) - SCR Diagnostics
Increasing this parameter increases the tolerance of such disturbances.