ABB RELION REX640 - 3.22.7.3 Signals; 3.22.8 Real less than or equal comparator LER; 3.22.8.1 Function block; 3.22.8.2 Functionality

GER function blocks do not have the hysteresis feature. Oscillating
outputs should be avoided when comparing analog signals that have
closely varying values.
3.22.7.3 Signals
Table 327: GER Input signals
Name Type Default Description
REAL_IN1 FLOAT32 0 Real input 1
REAL_IN2 FLOAT32 0 Real input 2
TOLR FLOAT32 0 Tolerance for compar-
ison
Table 328: GER Output signals
Name Type Description
OUT BOOLEAN Output value
3.22.8 Real less than or equal comparator LER
3.22.8.1 Function block
Figure 182: Function block
3.22.8.2 Functionality
The real less than or equal comparator function LER compares real input REAL_IN1
with the real input REAL_IN2 and activates the binary output OUT if REAL_IN1 is
equal to or less than REAL_IN2 + TOLR or less than REAL_IN2 input. That is, if
REAL_IN1 ≤ (REAL_IN2 + TOLR) or REAL_IN1 < (REAL_IN2), OUT = 1, else OUT = 0.
LER function blocks do not have the hysteresis feature. Oscillating
outputs should be avoided when comparing analog signals that have
closely varying values.
Basic functions 1MRS759142 F
306 REX640
Technical Manual