ATC770 Microprocessor-Based Pressure/Process Controller 77
LOGIC INPUT STATUS - Group 4
Available: Only if LI.TYP is different than OFF.
Upper display: Status of logic input.
Lower display: LI.STS
Range: CLOSE, OPEn. The logic input is determined to be active when the contact is
closed or open.
Default value: Closed.
PEAK DETECTION - Group 4
Available: Always.
Upper display: Polarity of peak detector.
Lower display: PEAK
Range: OFF, HI, LO. Disabled, maximum peak, minimum peak.
Default value: Maximum peak.
MANUAL/AUTO TRANSFER - Group 4
Available: Always.
Upper display: Selection for transfer from manual to automatic mode.
Lower display: MA.TRF
Range: Bunpl, SP. Bumpless mode (without modification of set point) or set point
modification mode.
Default value: Bumpless.
NOTE: The bumpless mode returns to the previously entered set point. The set point modification
mode changes the set point to the value of the process variable.
SET POINT RAMP - Group 4
Available: Always.
Upper display: Set point rate of change value in engineering units per second.
Lower display: SP.RMP
Range: From 1 to 999 and then OFF (step change). This parameter is used to limit the rate
of change of the local set point; it is active also during switching from local to
remote set point and vice versa. When the ramp value meets the remote set point
input signal, the ramp function is disabled to allow the controller set point to match
the analog input.
Default value: OFF.
CONTROL OUTPUT LIMITER - Group 4
Available: Always.
Upper display: Control output limiter.
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