Chromalox 1020 User Manual

11
Message List
Message Description
ALARM
Alternates with PV and shows one, or both, Alarms are active.
LATCH
Alternates with PV, one or more outputs are latched on & no alarm is active.
LIMIT
On Limiter model, alternates with PV to show Limit is active.
HIGH
Process variable input >5% over-range.
Check for possible issues with sensor or connections.
Also, check that Scale Range Maximum is high enough for your application.
LOW
Process variable input >5% under-range.
Check for possible issues with sensor or connections.
Also, check that Scale Range Minimum is low enough for your application.
OPEN
Break detected in process variable input sensor, wiring or wrong input type selected.
Shows OPEN until resolved, Control is disabled on Standard or Extrusion models), or
Limit state set until resolved on Limiter model.
ERROR
Selected input range is not calibrated.
Shows ERROR until resolved. Control is disabled on Standard or Extrusion models),
or Limit state set until resolved on Limiter model.
TUNE
Alternating with SP shows Auto-tuning is in progress.
P%
Manual power value replaces setpoint, shows P% xxx of power.
Ramp
Setpoint ramp is active (alternates with actual setpoint).
OFF
Control is disabled. Control output(s) are off.
Enable control by setting Control Enable to ON or check state of the Digital Input if
Digital I/P Action is set to Ctrl Enable/Disable.
DELAY
Shows when Delay Timer is active, control is off until the timer finishes.
The Automatic Tuning parameter must be changed to Off to clear any tuning message.
Display alternates between the tuning code & setpoint
tErr1
PV within 5% of the scale range input from SP (for Pre-Tune).
Try a different setpoint or narrow the scale range input.
tErr2
Setpoint is ramping.
tErr3
Control is ON/OFF. Control is not set to PID, i.e. the proportional band = 0.
tErr4
Control is manual. Set Manual Control Enable to OFF.
tErr5
Tune at Setpoint not able to run.
tErr6
Sensor Break.
tErr7
Timer Running. Set the Enable Timer parameter to Disabled before attempting to run
tuning again.
tErr8
Control is disabled. Please check it is safe to enable control and then go to the User
menu to change Control Enable to ON.

Chromalox 1020 Specifications

General

Brand	Chromalox
Model	1020
Category	Temperature Controller
Language	English