CHAPTER 3: IEC 61850 COMMUNICATION PIXIT CONFORMANCE STATEMENT
UR FAMILY – COMMUNICATIONS GUIDE 3-225
3
Table 3-234: PIXIT for Control model
ID Edition Description Value / Clarification
Ct2  1,2  Is the control model fixed, configurable and/
or dynamic?
Fixed, Configurable, or Dynamic depending on 
the particular control point
Ct4 1,2 Is "operate many" supported (compare 
sboClass)
N
Ct9  1,2  Which additional cause diagnosis are 
supported?
N Unknown
Y Not-supported
Y Blocked-by-switching-hierarchy
Y Select-failed
Y Invalid-position
Y Position-reached
N Parameter-change-in-execution
N Step-limit
Y Blocked-by-Mode
N Blocked-by-process
Y Blocked-by-interlocking
Y Blocked-by-synchrocheck
Y Command-already-in-execution
N Blocked-by-health
N 1-of-n-control
N Abortion-by-cancel
N Time-limit-over
N Abortion-by-trip
Y Object-not-selected
Edition 2 specific values:
Y Object-already-selected
N No-access-authority
N Ended-with-overshoot
N Abortion-due-to-deviation
N Abortion-by-communication-loss
Y Blocked-by-command 
N None
Y Inconsistent-parameters 
Y Locked-by-other-client
Ct10  1,2  How to force a “test-not-ok” respond with 
SelectWithValue request
Not possible
Ct11  1,2  How to force a “test-not-ok” respond with 
Select request
Not possible
Ct12  1,2  How to force a “test-not-ok” respond with 
Operate request
DOns: 
SBOns:
DOes: 
SBOes:
As per IEC 61850-8-1, clause 20.11 (“Operator 
Test Not OK” shall be returned if an Operate 
control command is issued, with TEST=TRUE, 
and the operation fails.)
Ct13  1,2  Which origin categories are supported / 
accepted?
Y bay-control
Y station-control
Y remote-control
Y automatic-bay
Y automatic-station
Y automatic-remote
Y maintenance
Y process
Ct14  1,2  What happens if the orCat value is not 
supported or invalid?
DOns: Operate fails
SBOns: Operate fails
DOes: Operate fails
SBOes: Select fails
Ct15  1,2  Does the IED accept a SelectWithValue / 
Operate with the same control value as the 
current status value?
Is this behavior configurable?
DOns: N
SBOns: N
DOes: N
SBOes: N
Configurable N