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DR4300 Circular Chart Recorder
118 DR4300 Circular Chart Recorder Product Manual 12/03
4.3.22 Limit Control Configuration
Special configuration for control and alarms
The DR4300 is available as a limit controller. Most set up groups described in Subsections 4.3.7 through
4.3.20 apply to limit control, and are configured for the limit controller the same way they are for other
recorders.
The exceptions are:
• Control set up group contains special parameters for limit control in place of those described in
Subsection 4.3.11. The limit control set up parameters that replace those in Subsection 4.3.11 are
listed in Table 4-19.
• Alarm 1 is not available.
Table 4-19 Limit Control Parameter Definitions
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
LIMIT
HI
[factory setting]
LO
TYPE OF LIMIT CONTROL
HI — Limit action occurs when PV exceeds SP.
LO — Limit action occurs when PV is less than SP.
POWRUP
NORM
RST
[factory setting]
POWER UP STATE
NORM — Normal limit control on power up.
RST — Powers up in limit state. Recorder will not begin
normal limit control until RESET key is pressed.*
SP HI
–999 to 9999
[factory setting = 100]
SETPOINT HIGH RANGE LIMIT —This parameter
prevents the local setpoint from going above the value
specified here. The setting must be equal to or less than
the upper range of the input.
SP LO
–999 to 9999
[factory setting = 0]
SETPOINT LOW RANGE LIMIT—This parameter
prevents the local setpoint from going below the value
specified here. The setting must be equal to or greater
than the lower range of the input.
XRSET
DIS
[factory setting]
ENAB
EXTERNAL RESET—Use this parameter to enable or
disable resetting the limit controller (taking it out of the
limit state) using Remote Switch 1 (digital
input 1).
DIS — When external reset is disabled, the limit controller
can be reset only by pressing the MAN/AUTO/RESET
key on the recorder.
ENAB — When external reset is enabled, the limit
controller can be reset two ways: by pressing the
MAN/AUTO/RESET key on the recorder, or by turning on
digital input 1 (contact closed).