P
AGE
6
1.1.3 CONTROL
The instrument can be programmed for on-off, time proportioning, current proportioning, or
position proportioning control implementations depending on the model number. A second
control output is an available option. Proportional control implementations are provided with
fully programmable separate PID parameters.
1.1.4 ALARM
Alarm indication is standard on all instruments. Alarm type may be set as PROCESS DIRECT
or REVERSE (High or Low), DEVIATION DIRECT or REVERSE (Above or Below setpoint), or
DEVIATION BAND TYPE (Closed or Open within the band). Alarm status is indicated by
LED. An alarm output can be provided by assigning any output(s) SPST relay(s) or SSR
Driver(s) to the alarm.
1.1.5 EXTENDED FEATURES SOFTWARE
EA Software Features
Fast Scan
Provides an optional faster scan rate of 3 scans per second.
Normal scan is one scan per second.
Process Rounding
Provides rounding of the process value displayed to reduce display
fluctuation. For example, the displayed value can be rounded to
the nearest 5 (display -5, 0, 5, 10, etc.). This is for display only and
does not affect the control action.
Extended Current
The current outputs available can be extended to include 0-20mA
Output Ranges
and 0-5VDC (with the appropriate shunt resistor), rather than the
standard 4-20mA and 1-5VDC outputs.
Process/Setpoint
The process or setpoint value can be scaled over any desired
Value Retransmit
range and retransmitted using one of the current outputs. (This
Capability
precludes the use of the output for control).
Percent Output
Provides a relay actuation based upon a proportional output being
Relay Actuation
above or below a specified value.
Contact Closure Sensing
This feature provides the following action: When a contact closure
for SP=PV
is sensed, the setpoint will be set equal to the current process
value. This is only done on the transition from open to closed, and
not continuously while the switch is closed.
EB Software Features
Setpoint Ramp
Provides a limitation on how fast the process value will ramp to setpoint by
Rate
limiting the rate of change of an internal setpoint used for control versus
the setpoint the operator specifies.
