1FT6044-1AF71 8 Pulse Input Debounce Time R/W/NV Sets the delay time for each input transition before registering a new state, 0 – 255 milliseconds. This suppresses glitches in the input, such as might be generated by a mechanical relay or electrical interference (see Figure 17). Affects both the Pulse Inputs (see ACC210, ACC220) and corresponding Binary Inputs (see BI201, BI202). Raw Input Debounced Figure 17: Debouncing Delay If possible, set the debounce time to 50% of the expected minimum pulse time. Setting 0 disables debouncing: new input states register immediately, but the count may be noisy. IMPORTANT: Because each pulse must have both a high and low interval, the maximum pulse rate will be 1/2 the equivalent rate of a single debounce time. For example, a 1 millisecond debounce time permits a maximum pulse rate of 500 Hz. Reduce the maximum pulse rate further when the duty cycle of the input is not 50%. Default: 10 milliseconds (50 Hz) AV242 PowerPrint Frequency R/W/NV Sets the expected PowerPrint frequency. If set to any non-zero value, and the Frequency (see AI410) differs from expected by more than the Frequency Tolerance (see AV244), then the Frequency Drift condition (see AV400) will be set. Set the expected frequency by writing this value directly, or by initializing PowerPrint (see BV241). Default: 0 Hz (undefined) AV244 PowerPrint Frequency Tolerance R/W/NV Sets the tolerance of the PowerPrint Frequency (see AV242), 0 – 10 Hz. Default: 0.2 Hz AV246 PowerPrint Voltage Tolerance R/W/NV Sets the tolerance of the PowerPrint Voltage (see AV1144) for all phases, 0 – 100% as a ratio of the target voltage. For example, given a target voltage of 240 V and a tolerance of 10%, PowerPrint expects voltages of 216 – 264 V. Default: 10% AV248 PowerPrint Voltage Angle Tolerance R/W/NV Sets the tolerance of the PowerPrint Voltage Angle (see AV1146) for all pairs of phases, 0– 180°. The default units are Degrees (see MSV153). Default: 30° EM-RS485 BACnet Protocol Guide Page 33 of 49 154-0022-0C AV400 Active Conditions R Returns an encoded set of flags representing active system conditions: • Mismatched Voltage (see AI1450) BIT [5] 32 • Reverse RST Order (see AI1440)* BIT [6] 64 • Not 3-Phase (see AI1440)* BIT [7] 128 • Frequency Drift (see AI420)** BIT [12] 4096 • Phase Drift (see AI1440)** BIT [15] 32768 The conditions reflect the near-real-time system status observed over the previous 1 – 2 seconds. The Line Status LED also indicates the active conditions (see Installation Instructions). If no CVTs are installed, always returns “0”. To decode a set of condition flags, see Appendix A. *Conditions only reported when the PowerPrint Voltage (see AV1144) is undefined. **Conditions only reported after activating the corresponding PowerPrint feature(s). AV401 Previous Conditions R/W0 Returns an encoded set of flags representing all active and historical system conditions. Equivalent to Active Conditions (see AV400), except that conditions remain in the set until manually cleared. Write “0” to clear historical flags (set in AV401 but no longer set in AV400). Flags are also cleared when the meter resets. Active flags (still set in AV400) cannot be effectively cleared, since they will be immediately re-set. R Phase AV1140 Voltage Rating R Returns the CVT’s maximum rated RMS voltage. This always applies to the raw input voltage, measured between the CVT voltage leads without considering the Voltage Multiplier (see AV1142). If the direct input voltage exceeds this rating, the Over Voltage condition (see AV1400) will be set. In Over Voltage conditions voltage, power, and energy measurements may have reduced accuracy. WARNING: Exceeding the rated RMS voltage may result in hazardous operating conditions. AV1142 Voltage Multiplier R/W/NV Sets a multiplier to scale from raw input voltage to effective line voltage. Set equal to the ratio of any potential transformer used to step down voltages higher than the maximum rating. For example, set 35.0 when using a 4200:120 V potential transformer. The RMS Voltage (see AI1420) always returns the effective line voltage including the multiplier. Power and energy measurements scale by the same factor. Negative multipliers can correct installations where CVT voltage leads are installed backwards: • Has no effect on RMS Voltage (see AI1420), which is always positive. • Reverses the direction (import/export) of Power Factor (see AI1550), Real Power (see AI1600), and Reactive Power (see AI1640). • Adds 180° to Current Angle (see AI1540), unless the Current Multiplier (see AV1152) is also negative, in which case the signs cancel. • Adds 180° to both Phase to Phase Voltage Angles (see AI1440) that include this phase, unless the other phase Voltage Multiplier (see AV2142, AV3142) in the pair is also negative. Default: 1.0 EM-RS485 BACnet Protocol Guide Page 34 of 49 154-0022-0C AV1144 PowerPrint Voltage R/W/NV Sets the expected PowerPrint voltage. If set to any non-zero value, and RMS Voltage (see AI1420) differs from expected by more than the PowerPrint Voltage Tolerance (see AV246), then either the Brown Out Voltage or Surge Voltage conditions (see AV1400) will be set. Set the expected voltage by writing this value directly, or by initializing PowerPrint (see BV241). Default: 0 (undefined) AV1146 PowerPrint Voltage Angle R/W/NV Sets the expected PowerPrint relative voltage angle between this phase and the “next” (as defined for Voltage Angle, see AI1440). If both phases have a non-zero PowerPrint Voltage (see AV1144), and the relative Voltage Angle differs from the expected angle by more than the Voltage Angle Tolerance (see AV248), then the Phase Drift condition (see AV1400) will be set. Set the expected angle by writing this value directly, or by initializing PowerPrint (see BV241). Default: 0 (undefined) AV1150 Current Rating R Returns the CVT’s rated RMS current. This always applies to the raw input current measured in the Rogowski Coil loop without considering the Current Multiplier (see AV1152). The rating applies only at 60 Hz; ratings at other frequencies are inversely proportional (see AI1520). If the raw input current exceeds this rating, the Over Current condition (see AV1400) may be set. However, this condition reflects the technology capability of the current sensing loop, which may be higher than rating in some cases. In Over Current conditions the current, power, and energy measurements may have reduced accuracy. AV1152 Current Multiplier R/W/NV Sets a multiplier to scale from raw input current to effective line current. Set the inverse of the number of times the conductor passes through the current sensor loop. For example, set 0.2 when the conductor wraps 5 times. WARNING: Never deform the Rogowski Coil! Wrapping a conductor may increase accuracy when measuring very low currents, but may also reduce accuracy by deviating from the recommended installation procedure (see Installation Instructions). Performance specifications not guaranteed. The RMS Current (see AI1520) always returns the effective line current including the multiplier. Power and energy measurements scale by the same factor. Negative multipliers can correct installations where a current transducer is installed backwards: • Has no effect on RMS Current (see AI1420), which is always positive. • Reverses the direction (import/export) of Power Factor (see AI1550), Real Power (see AI1600), and Reactive Power (see AI1660). • Adds 180° to Current Angle (see AI1540), unless the Voltage Multiplier (see AV1142) is also negative, in which case the signs cancel. Default: 1.0 EM-RS485 BACnet Protocol Guide Page 35 of 49 154-0022-0C AV1162 Power Multiplier R/W/NV Sets a multiplier to scale from raw input power to reported power. For example, set 3.0 to infer the other power and energy of all three phases of a balanced load while measuring just one. This way, the reported measurements have the correct magnitude and scale without any post-calculation. WARNING: The less balanced the phases, the more this technique reduces measurement accuracy, especially for reactive power. However, the equipment and installation savings may be worthwhile when the primary objective is a relative/trend type measurement. Negative multipliers reverse the direction (import/export) of Power Factor (see AI1550), Real Power (see AI1600), and Reactive Power (see AI1640). Setting this value also sets the Power Multiplier Override (BV1161) to Active. To restore the default, set the Power Multiplier Override to Inactive. Default: 1.0 AV1192 Statistics Reset W Always returns 0. Write one of the following |
