Marathon Computer V3.5 user manual Direct

MMI Product Documentation

DThis is

DIRECT

operation for alarm actuation (i.e. the contact is normally open until it reaches the trigger limit specified in the

ALARM VALUE then the contact closes).

Notes: continued

Variable Description

RREVERSE operation (opposite of NORMAL) for ALARM actuation (i.e. the alarm contact is normally closed until it reaches the trigger limit specified in the ALARM VALUE then the contact opens).

IN B Alarm actuation is based on the analog signal at Input B inputs exceeding the limit in the Alarm Value. Input B inputs is physically located at TBD-4, TBD-5, and TBD-6 on the unit's rear connectors.

AUX Alarm actuation is based on the analog signal at Input C exceeding the limit in the ALARM VALUE. Input C is physically located at TBD-7, TBD-8, and TBD-9 on the unit's rear conductors.

BND Alarm actuation uses BAND WIDTH control above and below a programmed setpoint limit. (i.e. If the band is set by the ALARM VALUE to 0.10 and the

Unipro 3.5 Process Control 1 Aug. 1997