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MICRA-M
SETPOINTS OUTPUTS
Introduction
An option of 2 or 4 SETPOINTS, programmable within the full display range, can be incorporated to the unit thus
providing alarm and control capabilities by means of individual LED indicators and relay or transistor outputs. All the
setpoints provide independently programmable value, time delay (in seconds), asymmetrical or symmetrical hysteresis
(in counts of display) and selectable HI/LO acting.
The setpoint option consists of a plug-in additional card that once installed to the meter's main board, activates its
own programming module, they are totally configurable by the user and their access can be locked out via software.
These are the control output options available:
2RE: 2 Relays SPDT 8A
4RE: 4 Relays SPST 5A
4OP: 4 NPN outputs
4OPP: 4 PNP outputs
These types of outputs, capable of carrying out a wide variety of control operations and processing of limit values,
increases notably the unit's performance qualities thanks to the possibility of combining basic alarm functions with
advanced safety and control applications.
Description of operation
As programmed like independent setpoints, the alarm outputs activate when the display value reaches the user-
programmed value. The independent alarms programming requires definition of the following basic parameters:
a. COMPARISON NET/ GROSS
In "NET" mode will compare the setpoint value with the display net value. In "GROSS" mode, the comparison will be
with the sum net + tare.
b. HI/ LO ACTING MODE.
In HI mode, the output activates when the display value exceeds the setpoint level and in LO mode, the output acti-
vates when the display value falls below the setpoint
c. RELAYS CONTACT DEFAULT STATE NO/NC.
Defines relays contact status by default: "NO" (normall open) or "NC" (normally closed). NC status can be used as a
FAIL SAFE function, allowing the power supply or device failure detection sending a signal informing to the PLC or
main monitoring system.
d. PROGRAMMABLE TIME DELAY or HYSTERESIS.
Each output action can be deferred by a programmable time delay or hysteresis level.
The time delay is the time that takes the output to activate after passing through the setpoint in the up or down di-
rection, while the hysteresis band will be selected asymmetrical i.e. only acts on the output deactivation edge.
The delay is programmable in seconds, from 0 to 99.
The hysteresis can be programmed, in counts, within the full display range. The decimal point appears in the same
position as programmed in the display configuration module.
The figures 1 and 2 show the time delay action (dly) and the asymmetrical hysteresis action (hys-1) of two alarms
(SET1 and SET2) programmed to activate in HI mode (OUT1) and LO mode (OUT2)
Delay action
Asymmetrical hysteresis
KOSMOS SERIE
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