Honeywell 80360230-001 Communications Interface

Functional Description

The Basic Controller is equivalent to eight conventional multi-mode multi-functional controllers.

The electronics are packaged in a single card file and the process interconnection is terminated at the printed wire terminal panel.

Eight sets of process signals, hardwired to the terminal panel, are interrogated individually by the controller file, and a customer-selected equation or algorithm is applied to each.

This action results in eight discrete analog output control signals which are routed back to the terminal panel for distribution to the respective control elements.

The process input signals, a code relating to the selected algorithm, and the resultant output signals are stored digitally in the designated controller file areas referred to as computational slots.

A slot, therefore, contains the required data necessary for the controller action.

Algorithms are pre-defined and are resident in the controller file.

They contain a mathematical expression in which the process variable (PV), setpoint (SP), and time (t) are the variables in the equation, and the resultant is the control out- put (C), where: C = f(PV, SP, t)

There are 28 resident algorithms, including 10 variations of 3-mode control which provide proportional, integral, and derivative action.

The remaining 18 include control algorithms and auxiliary functions such as multiplication/division, square root extraction, lead-lag, and override signal selection.

One of the 28 is selected during the controller file configuration for each of the 8 computational slots.

Figure 2 is a symbolic representation of the 8 slots which store configuration and process data and which perform all controller action.

Data words depicting the applicable constants, direct or reverse actuation,

output indication, limits, and alarms are

entered and stored during the configuration procedure for each of the 8 slots.

The 8 sets of data words are indepen- dently acted upon by the microprocessor- or resulting in eight discrete control actions.

A limit alarm is available for each slot that will activate when the customer- selected PV or deviation limits are exceeded.

The PV alarm is triggered when the absolute value of the PV input exceeds its predetermined limit.

The alarm type and limit are also entered during the configuration procedure.

Continuous self-diagnosis is performed 3 times per second by the controller file on its major hardware and firmware components.

A subsequent failure the detection will cause the slot outputs to be fixed at their last value and the file

t0 be placed in the non-operating reset mode.

controller file for the failed or powered down primary controller.

The operating data stored in the CMOS

the memory of a failed primary controller is immediately transferred to the CMOS

the memory of the reserve controller,

shoulda primary failure occur.

A restart command is automatically issued to the reserve controller and process control is resumed.

The entire switch-in operation is completed within one second.

No functional differences exist between the CB120 and the CB121 models other than those just described.

Additionally, primary and reserve controller files of the UAC system are identical without exception.

Honeywell 80360230-001

Honeywell 80360230-001

Honeywell 80360230-001

Mounting

The Basic Controller file is designed to fasten to a set of mounting hardware which includes the power bus system.

The mounting hardware fits any stan- dard Electronics Industries Association (EIA) 19-inch enclosure.

[Adapters areavailable to fit 24-inch enclosures].

Outline and dimension drawings for the card file and terminal panels are shown in Figure 6.

Indicators

There is a minimum of 8 LED indicators provided in the Basic Controller file.

These are located on the edge of the printed wire cards and on the backplane.

Two additional LEDs are localed on the optional cards. and a final LED on the CMOS memory card,

when used.

Local Switch Controls

A power on-off switch is mounted to the card cage of the controller file.

This switch interrupts the 24 Vdc source 10 the regulator card and should be utilized whenever a PW card is removed or

inserted.

The core and CMOS memory cards each contain a protect-enable switch, These memories are continuously up-dated with controller file data when the the switch is in the enable position.

Data in memory is retained at its current state and not updated when the switch is placed in the protected position.

An alternate CPU restart capability is provided at the controller file.

The restart command can be initiated by placing a short circuit between a pair of test pins labeled (TP-1) on the CPU card.

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