Chromalox 6050 User Manual

87
Integral
Type: Controller Tuning Parameter
Refer to Automatic Reset.
Latching Relay
Type: General Denition
A type of relay that, once it becomes active, requires
a reset signal before it will deactivate. This output is
available on Limit controllers and indicator alarms. To
successfully deactivate a latched relay, the alarm or
limit condition that caused the relay to become active
must first be removed and then a reset signal can be
applied. This signal may be applied from the instrument
keypad, Digital Input or command via Serial Commu-
nication.
Also refer to Alarm Operation, Indicator, Limit Control-
ler, Limit Hysteresis, Serial Communications.
LED
Type: General Denition
Light Emitting Diode. LED’s are used as indicator lights
(e.g. for the alarm indication). The upper and lower
7-segment displays are also LED’s.
Limit Controller
Type: Limit Controller Denition
A protective device that will shut down a process at a
preset Exceed Condition, in order to prevent possible
damage to equipment or products. A fail-safe latching
relay is used, which cannot be reset by the operator
until the process is back in a safe condition. This sig-
nal may be applied from the instrument keypad, Digi-
tal Input or command via Serial Communication. Limit
controllers work independently of the normal process
controller. Limit Controllers have specific approvals for
safety critical applications. They are recommended for
any process that could potentially become hazardous
under fault conditions.
Also refer to Annunciator, Controller, Exceed Condition,
Exceed Time, Latching Relay, Limit Hysteresis, Limit
Setpoint and Serial Communications.
Limit Hysteresis
Type: Limit Controller Denition
An adjustable band on the “safe” side of the Limit Set-
point. For a high limit, the hysteresis band is below
the limit setpoint value, for a low limit, the hysteresis
is above the limit setpoint value. The latching limit relay
cannot be reset by the operator until the process has
passed through this band
Also refer to Exceed Condition, Latching Relay, Limit
Controller and Limit Setpoint.
Limit Setpoint
Type: Limit Controller Denition
The pre-set value at which an Exceed Condition will
occur. When a Limit Controller has been set for High
Limit control action, the Exceed Condition is above the
Limit Setpoint. When a Limit Controller has been set
for Low Limit control action, the Exceed Condition is
below the Limit Setpoint.
Also refer to Annunciator, Exceed Condition, Limit Hys-
teresis, Limit Controller and Setpoint.
Lock Codes
Type: General Parameter
Defines the four-digit codes required to enter Configu-
ration (20), Set-Up (10), and Auto Tuning (0) modes.
Display codes = cLoc, SLoc and tLoc, default val-
ues shown above in brackets
Logical Combination of Alarms
Type: General Denition
Two alarms may be combined logically to create an
AND/OR situation. Any suitable output may be as-
signed as a Logical Alarm Output, configured for Re-
verse-acting or Direct action.
Also refer to Alarm Operation
Table 42. Logical Alarm Outputs
Logical OR: Alarm 1 OR Alarm 2
Direct Acting Reverse-Acting
ALARM 1
OFF
ALARM 2
OFF
OUTPUT
OFF
ALARM 1
OFF
ALARM 2
OFF
OUTPUT
ON
ON OFF ON ON OFF OFF
OFF ON ON OFF ON OFF
ON ON ON ON ON OFF
Logical AND: Alarm 1 AND Alarm 2
Direct Acting Reverse-Acting
ALARM 1
OFF
ALARM 2
OFF
OUTPUT
OFF
ALARM 1
OFF
ALARM 2
OFF
OUTPUT
ON
ON OFF OFF ON OFF ON
OFF ON OFF OFF ON ON
ON ON ON ON ON OFF

Chromalox 6050 Specifications

General

Brand	Chromalox
Model	6050
Category	Controller
Language	English