Despatch MIC1422 Controller User Manual

Page 25

SECTION 3: OPERATION

3.1 Control Capability

The capabilities available in a specific unit are dependent upon the hardware options
specified when the instrument is ordered. Refer to Appendix E for the decoding of the
instrument model number. Current proportioning control cannot be implemented if a
current output was not ordered. The available output types and quantity of each are as
follows:

Type of Output

Quantity Available

•

SPDT mechanical relay output

Up to three

•

SSR Driver

Up to three

•

mADC current output

Up to two

3.2 Control Responses

Each instrument may be configured to provide three mode proportional control.
Proportional control is provided with Proportional Band, Integration, and Derivative
responses. The PID parameters are defined as follows:

Out 1 Out2

P (Proportional)

Proportional Band Pb1

Pb2

I (integration)

Automatic Reset

ArSt

D (Derivative)

Rate

rAtE

Manual Reset is provided for use in lieu of, or in conjunction with automatic reset. A
cycle time adjustment parameter is provided for use with each time proportioning
control output.