ABB RELION REF615R, Technical Manual

Page: 95 / 664

3.13.1.2 Function block
RESET
SHFT
SHIFT
HOLD O1
O2
O3
O4
O5
O6
O7
O8
GUID-6C06C594-67A7-4CA0-ACED-0839B9C7D66B V1 EN
Figure 34: Function block
3.13.1.3 Functionality
The generic select shifter function SHFT turns off the present output and turns on the next
consecutive enabled output for each positive edge of the shift input. The shifter output can
be reset to the first output or held in place, if required.
The shifter function has eight outputs, only one of which can be active at a time. An event
is generated each time the output changes. The present active output is stored in non-
volatile memory and is restored at initialization.
3.13.1.4 Operation principle
The Operation setting is used to enable or disable the function. When "On" is selected, the
function is enabled, and when "Off" is selected, the function is disabled. The operation of
SHFT can be described by using a module diagram.
SHIFT
HOLD
RESET
Shifter
O6
O7
O8
O5
O4
O3
O2
O1
GUID-1DDC986F-5795-4C2B-9D8C-E7AA4D15FDB9 V1 EN
Figure 35: Functional module diagram
1MRS240050-IB C
Section 3
Basic functions
REF615R 89
Technical Manual