Energy Pulse Outputs - Allen-Bradley Rockwell Automation 857 User Manual

Energy Pulse Outputs

The device can be configured to send a pulse whenever certain
amount of energy has been imported or exported. The principle is
presented in Figure 4.5. Each time the energy level reaches the pulse
size, an output relay is activated and it will stay active as long as
defined by a pulse duration setting.
Figure 4.5 – Principle of Energy Pulses
The device has four energy pulse outputs. The output channels are:
•
Active exported energy
•
Reactive exported energy
•
Active imported energy
•
Reactive imported energy
Each channel can be connected to any combination of the output
relays using output matrix. The parameters for the energy pulses
can be found in the E menu under the submenus E-PULSE
SIZES and E-PULSE DURATION.
Table 4.15 – Energy Pulse Output Parameters
Parameter
E-PULSE E+
SIZES
Eq+
E-
Eq-
E-PULSE E+
DURATION
Eq+
E-
Eq-
Supporting Functions
Value Unit
10 ... 10 000 kWh Pulse size of active
exported energy
10 ... 10 000 kvarh Pulse size of reactive
exported energy
10 ... 10 000 kWh Pulse size of active
imported energy
10 ... 10 000 kvarh Pulse size of reactive
imported energy
100 ... 5000 ms Pulse length of active
exported energy
100 ... 5000 ms Pulse length of reactive
exported energy
100 ... 5000 ms Pulse length of active
imported energy
100 ... 5000 ms Pulse length of reactive
imported energy
4-17
Description
857-UM001A-EN-P – July 2009