Operative Mode - ero electronic LFS User Manual

Relay outputs
Outputs 1 and 2: 2 relay interlocked, SPST
contact with rated current 3 A at 250 V AC on
resistive load ( NO contact ).
Output 3: SPST contact with rated current 2 A at
250 V AC on resistive load.
Output 4: SPST contact with rated current 2 A at
250 V AC on resistive load.
NOTE: the side C of the OUT 3 and OUT 4 are
common.
Output status indication: 4 indicators (s, t,
OUT 3 and OUT 4) are lit when the respective
output is in ON condition.
ALARMS
Actions: Direct or reverse acting.
Alarm functions: each alarm can be configured
as process alarm, band alarm or deviation alarm.
Alarm reset: automatic or manual reset
programmable on each alarm.
Stand by (mask) alarm: each alarm can be
configured with or without stand by (mask)
function.
This function allows to delete false indication at
instrument start up and/or after a set point change.
Process alarm:
Operative mode : High or low programmable.
Threshold : programmable in engineering unit within
the input span.
Hysteresis: programmable from 0.1 % to 10.0 % of
the input span (P4 - P3).
LFS-servo-1-02.p65 33
Band alarm
Operative mode: Inside or outside programma-
ble.
Threshold : programmable from 0 to 500 units.
Hysteresis : programmable from 0.1 % to 10.0 % of
the input span.
Deviation alarm
Operative mode : High or low programmable.
Threshold : programmable from - 500 to +500
units.
Hysteresis : programmable from 0.1 % to 10.0 % of
the input span.
SERIAL COMMUNICATION INTERFACE
Type: RS-485
Protocol type: MODBUS, JBUS, ERO polling/
selecting.
Baud rate: programmable from 600 to 19200
BAUD.
Byte format: 7 or 8 bit programmable.
Parity: even, odd or none programmable.
Stop bit : one.
Address :
- from 1 to 95 for ERO protocol
- from 1 to 255 for all the other protocols
Output voltage levels: according to EIA standard.
NOTE: The "serial comunication" and the "logic
input" options are mutually exclusive and can be
selected by a jumper setting.
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1/14/02, 3:44 PM