User`s manual

98 Chapter 7 535 User's Manual
Applications
NOTE: PV GAIN is only available if
using a linear voltage or current input.
5. SP SELECT locks out the SET PT key. This prevents the operator from
changing among the various local setpoints or changing to remote setpoint.
It does not prevent the operator from changing the setpoint value via the ▲
and ▼ keys.
6. ALARM ACK. locks out the ACK key, preventing an operator from
acknowledging any alarms.
7. TUNING locks out modification to the parameters in the TUNING menu,
preventing unauthorized changes to the tuning parameters or the activation/
deactivation of the self tuning algorithm.
8. CONFIGURE allows access to the configuration menus, but prevents any
unauthorized changes to the configuration parameters. If locked out, the
security code is not accessible.
Basic Operating Procedures
The security feature can be overridden. When a locked function is attempted, the
operator will have the opportunity to enter the security code. If the correct security
code is entered, the operator has full access. The security feature is
reactivated after one minute of keypad inactivity. If the security code is for-
gotton, the security feature can still be overridden.
• Please contact Moore Industries to obtain the security override code.
Once you obtain security override code, make sure to save it and store
in a secure location and limit access.
R. RESET INHIBITION
Reset Inhibition is useful in some systems either at the start-up of a process or
when a sustained offset of process variable from setpoint exists. In conditions
like these, the continuous error signal may cause the process temperature to
greatly overshoot setpoint. Any of the digital inputs may be set up so that the
contact closure disables the reset action (sets it to zero).
Software Configuration
1. Go to the CONFIG. menu.
2. Set corresponding parameter(s) CONTACT:1 to CONTACT:5 to RST.
INHBT.
S. PROCESS VARIABLE READING CORRECTION
Conditions extraneous to the controller, an aging thermocouple, out of
calibration transmitter, lead wire resistance, etc.—can cause the display to
indicate a value other than the actual process value. The PV OFFSET and PV
GAIN parameters can be used to compensate for these extraneous conditions.
NOTE: This feature is provided as a convenience only. Correcting the cause
of the erroneous reading is recommended.
1. Go to the PV INPUT menu.
2. Set PV OFFSET. This parameter either adds or subtracts a set value from
the process variable reading in engineering units. For example, if the ther-
mocouple was always reading 3° too high, the parameter could be set to “–
3” to compensate.
3. Set PV GAIN. This multiplies the deviation from the low end of the process
variable range by the gain factor and then adds it to the value of the low end
NOTE: Lock out CONFIGURE for full
security. If left unlocked, the operator
will have access to the security code.
NOTE: The security function is
compromised if the security code is left
at zero (0).
NOTE: Security does not prevent the
operation from the digital inputs or
serial communications.