Siemens SIMPRO-100 - Control Equation Operator Usage; Control Equation Operators Defined; Control Equation AND Operator [*]; Control Equation OR Operator [+] Explained

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Control Equations & Relay Logic
SIMPRO-100
140 PRIM-2400C
4
47T Phase Reversal Trip. Asserts when the relay detects a phase reversal condition, if phase reversal
tripping is enabled by the relay settings.
TRGTR Target Reset. Asserts for one quarter-cycle when you execute a front-panel or serial port target reset
command.
START Asserts when an internal relay function calls for a motor start. A motor start only occurs if a relay output
contact is programmed with this relay word bit and connected to close the motor contactor or circuit
breaker.
52A Asserts when the control equation 52A result is logical 1. Use to indicate that the motor contactor or
circuit breaker is closed.
SPDSTR Speed Switch Trip. Asserts when the relay does not detect a speed switch contact closure within a
settable period from the beginning of a motor start, if the function is enabled by relay settings.
SPEEDSW Speed Switch Input. Asserts when the control equation SPEEDSW result is logical 1. Used to indicate
that the motor speed switch contact is closed.
RTDBIAS RTD Bias Alarm. When enabled, asserts when the motor winding temperature rise is greater than 60°C
over ambient and the RTD % Thermal Capacity is more than ten percentage points higher than the
motor thermal element % Thermal Capacity. Typically indicates a loss of motor cooling efficiency.
RTDFLT Asserts when an open or short circuit condition is detected on any enabled RTD input, or
communication with the external RTD module has been interrupted.
5
WDGALRM
WDGTRIP
Winding Temperature Alarm and Trip. WDGALRM asserts when any healthy winding RTD temperature
exceeds its alarm setpoint. WDGTRIP asserts when one or two (when EWDGV = Y) healthy winding
RTD temperatures exceed their trip setpoints.
BRGALRM
BRGTRIP
Bearing Temperature Alarm and Trip. BRGALRM asserts when any healthy bearing RTD temperature
exceeds its alarm setpoint. BRGTRIP asserts when one or two (when EBRGV = Y) healthy bearing
RTD temperatures exceed their trip setpoints.
AMBALRM
AMBTRIP
Ambient Temperature Alarm and Trip. AMBALRM asserts if the healthy ambient RTD temperature
exceeds its alarm setpoint. AMBTRIP asserts when the healthy ambient RTD temperature exceeds its
trip setpoint.
OTHALRM
OTHTRIP
Other Temperature Alarm and Trip. OTHALRM asserts when any healthy other RTD temperature
exceeds its alarm setpoint. OTHTRIP asserts when one or two (when EOTHV = Y) healthy bearing
RTD temperatures exceed their trip setpoints.
6
27P1
27P2
Level 1 and Level 2 Phase Undervoltage Pickup.
59P1
59P2
Level 1 and Level 2 Phase Overvoltage Pickup.
59G Residual Overvoltage Element Pickup.
81D1T
81D2T
81D3T
Level 1, Level 2, and Level 3 Definite Time Over/Underfrequency Element Trip. Assert when the
frequency has been either above or below the element setpoint for a definite time.
7
37PA
37PT
Underpower Alarm (37PA) and Trip (37PT). Assert when the relay issues an underpower element
alarm or trip.
55A
55T
Power Factor Alarm (55A) and Trip (55T). Assert when the relay issues a power factor element alarm
or trip.
VARA
VART
Reactive Power Alarm (VARA) and Trip (VART). Assert when the relay issues a reactive power element
alarm or trip.
*
*
Reserved for future use.
Row Bit Definition