Satec PM175 Manual User Manual download pdf (Page 80)

Chapter 4 PAS Application Software

General Meter Setup

Series PM175 Powermeters

Using Event Flags

The PM175 provides 8 common binary flags, called event

flags, which can be individually set, cleared and tested through

setpoints and via communications.

Event flags can be used in different applications, for example,

to transfer events between setpoints in order to expand a

logical expression or a list of actions that have to be done for a

specific event, or to externally trigger setpoint actions from the

SCADA system or from a PLC through communications.

Using Interval Timers

The PM175 provides four interval timers that are commonly

used for periodic recording of interval data at the time of the

fault or in the presence of other events detected by a setpoint.

The timers can be programmed to generate periodic events at

user-defined intervals (see Using Periodic Timers).

Interval timers are not synchronized with the clock. When you

run a timer, it generates a pulsed event that can trigger a

setpoint if you have put the timer into a list of the setpoint

triggers. When the setpoint event is asserted, the timer is

restarted, and then generates the next event when the timer

interval expires.

If you want to record interval data at predefined intervals

without linking to other events, just select a timer as a setpoint

trigger and specify a data log file you want to use for

recording, in the setpoint actions list. If you want the periodic

data to be recorded in presence of a specific event, select

triggers that will identify your event, and then add the timer at

the end of the trigger list using the AND operator.

Using Time Triggers

If you want the setpoint actions to be synchronized with the

clock, for example, to provide synchronous recording interval

data each 15 minutes or each hour, or to output time pulses

through relay contacts, use the time triggers that generate

static events synchronized to the device clock.

You can exercise the default setting for Setpoint #1 in your

device as an example of using time triggers. The setpoint is

pre-programmed for data profiling at 15-minute intervals using

data logs #1 and #2.

Delaying Setpoint Operations

Two optional delays can be added to each setpoint to extend

monitoring setpoint triggers for a longer time before making a

decision on whether the expected event occurred or not. When

a delay is specified, the logical controller will change the

setpoint status only if all conditions are asserted for a period at

least as long as the delay time.

Note that you cannot use delays with pulsed events since they

are cleared immediately and will no longer exist on the next

setpoint scan.

Using Setpoint Events and Actions

When a setpoint status changes, i.e., a setpoint event is either

asserted or de-asserted, the following happens in your device:

1. The new setpoint status is logged to the setpoint status

from the SCADA system or from a programmable

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